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Geode achieves exceptional performance through a combination of modern systems programming (Zig), advanced networking (QUIC protocol), sophisticated query planning, and comprehensive indexing strategies.</p> <h3 id="introduction-to-database-performance" class="position-relative d-flex align-items-center group"> <span>Introduction to Database Performance</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="introduction-to-database-performance" aria-haspopup="dialog" aria-label="Share link: Introduction to Database Performance"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3><p>Database performance encompasses multiple dimensions:</p> <ul> <li><strong>Query Latency</strong>: Time to execute individual queries (milliseconds to seconds)</li> <li><strong>Throughput</strong>: Queries per second (QPS) the system can sustain</li> <li><strong>Concurrency</strong>: Number of simultaneous connections and transactions</li> <li><strong>Scalability</strong>: Performance characteristics as data volume grows</li> <li><strong>Resource Efficiency</strong>: CPU, memory, disk I/O, and network utilization</li> </ul> <p>Unlike traditional relational databases optimized for tabular data, graph databases must efficiently traverse relationships, often following unpredictable access patterns. Geode addresses these challenges through careful architectural choices and provides comprehensive tools for monitoring and optimization.</p> <h3 id="geodes-performance-architecture" class="position-relative d-flex align-items-center group"> <span>Geode&amp;rsquo;s Performance Architecture</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="geodes-performance-architecture" aria-haspopup="dialog" aria-label="Share link: Geodes Performance Architecture"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3> <h4 id="zero-cost-abstractions-with-zig" class="position-relative d-flex align-items-center group"> <span>Zero-Cost Abstractions with Zig</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="zero-cost-abstractions-with-zig" aria-haspopup="dialog" aria-label="Share link: Zero-Cost Abstractions with Zig"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Geode is implemented in Zig, a modern systems programming language that provides:</p> <p><strong>Memory Control</strong>: Direct control over allocation with no garbage collection pauses</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-zig" data-lang="zig"><span class="line"><span class="cl"><span class="c1">// Predictable memory allocation </span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="kr">var</span><span class="w"> </span><span class="n">arena</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">std</span><span class="p">.</span><span class="n">heap</span><span class="p">.</span><span class="n">ArenaAllocator</span><span class="p">.</span><span class="n">init</span><span class="p">(</span><span class="n">allocator</span><span class="p">);</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="k">defer</span><span class="w"> </span><span class="n">arena</span><span class="p">.</span><span class="n">deinit</span><span class="p">();</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="kr">const</span><span class="w"> </span><span class="n">nodes</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="n">arena</span><span class="p">.</span><span class="n">allocator</span><span class="p">().</span><span class="n">alloc</span><span class="p">(</span><span class="n">Node</span><span class="p">,</span><span class="w"> </span><span class="n">count</span><span class="p">);</span><span class="w"> </span></span></span></code></pre></div><p><strong>Compile-Time Optimization</strong>: Generic code specialized at compile time without runtime overhead</p> <p><strong>Zero-Cost Error Handling</strong>: Error handling compiled away in success paths</p> <p><strong>SIMD Support</strong>: Vectorized operations for bulk processing</p> <p>These features enable Geode to achieve performance comparable to C/C++ implementations while maintaining memory safety.</p> <h4 id="quic-protocol-networking" class="position-relative d-flex align-items-center group"> <span>QUIC Protocol Networking</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="quic-protocol-networking" aria-haspopup="dialog" aria-label="Share link: QUIC Protocol Networking"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Geode uses QUIC (Quick UDP Internet Connections) instead of traditional TCP:</p> <p><strong>Benefits over TCP</strong>:</p> <ul> <li><strong>0-RTT Connection Resumption</strong>: Clients reconnect instantly without handshake</li> <li><strong>Multiplexing Without Head-of-Line Blocking</strong>: Multiple queries over single connection</li> <li><strong>Built-in TLS 1.3</strong>: Security without performance penalty</li> <li><strong>Better Loss Recovery</strong>: Faster recovery from packet loss</li> </ul> <p><strong>Performance Impact</strong>:</p> <ul> <li>Lower latency for short queries (workload dependent)</li> <li>Higher throughput under packet loss (workload dependent)</li> <li>Connection pooling effectiveness improved</li> </ul> <h4 id="query-planning-and-optimization" class="position-relative d-flex align-items-center group"> <span>Query Planning and Optimization</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="query-planning-and-optimization" aria-haspopup="dialog" aria-label="Share link: Query Planning and Optimization"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Geode&rsquo;s query planner analyzes GQL queries and generates optimized execution plans:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Complex</span><span class="w"> </span><span class="kd">query</span><span class="w"> </span><span class="nc">analyzed</span><span class="w"> </span><span class="py">by</span><span class="w"> </span><span class="py">planner</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="w"> </span><span class="p">{</span><span class="py">country</span><span class="p">:</span><span class="w"> </span><span class="err">&#39;</span><span class="nc">USA</span><span class="err">&#39;</span><span class="p">})</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">price</span><span class="w"> </span><span class="err">&gt;</span><span class="w"> </span><span class="py">100</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">count</span><span class="p">(</span><span class="py">p</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">purchase_count</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">purchase_count</span><span class="w"> </span><span class="py">DESC</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">LIMIT</span><span class="w"> </span><span class="py">10</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Planner optimizations</strong>:</p> <ol> <li><strong>Index Selection</strong>: Chooses best index for filtering</li> <li><strong>Join Ordering</strong>: Orders traversals to minimize intermediate results</li> <li><strong>Predicate Pushdown</strong>: Applies filters as early as possible</li> <li><strong>Cardinality Estimation</strong>: Uses statistics to estimate result sizes</li> </ol> <h3 id="performance-monitoring-and-profiling" class="position-relative d-flex align-items-center group"> <span>Performance Monitoring and Profiling</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="performance-monitoring-and-profiling" aria-haspopup="dialog" aria-label="Share link: Performance Monitoring and Profiling"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3> <h4 id="explain-query-plan-visualization" class="position-relative d-flex align-items-center group"> <span>EXPLAIN: Query Plan Visualization</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="explain-query-plan-visualization" aria-haspopup="dialog" aria-label="Share link: EXPLAIN: Query Plan Visualization"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Use EXPLAIN to see how Geode will execute a query without running it:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="py">EXPLAIN</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">FOLLOWS</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">friend</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">LIKES</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Post</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">id</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="nv">$user_id</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">title</span><span class="p">,</span><span class="w"> </span><span class="py">count</span><span class="p">(</span><span class="py">friend</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">friend_likes</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">friend_likes</span><span class="w"> </span><span class="py">DESC</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Output</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">QueryPlan: </span></span><span class="line"><span class="cl"> 1. IndexSeek: User.id = $user_id (cost: 1) </span></span><span class="line"><span class="cl"> 2. Expand: (User)-[:FOLLOWS]-&gt;(friend) (est. 150 rows) </span></span><span class="line"><span class="cl"> 3. Expand: (friend)-[:LIKES]-&gt;(Post) (est. 3000 rows) </span></span><span class="line"><span class="cl"> 4. Aggregate: count(friend) GROUP BY p.title (est. 500 groups) </span></span><span class="line"><span class="cl"> 5. Sort: friend_likes DESC (est. 500 rows) </span></span><span class="line"><span class="cl"> 6. Limit: 10 </span></span><span class="line"><span class="cl">Estimated Cost: 3152 </span></span></code></pre></div><p><strong>Interpreting plans</strong>:</p> <ul> <li><strong>IndexSeek</strong>: Fast lookup using index (best case)</li> <li><strong>IndexScan</strong>: Scanning index range</li> <li><strong>NodeScan</strong>: Full table scan (avoid if possible)</li> <li><strong>Expand</strong>: Relationship traversal</li> <li><strong>Filter</strong>: Post-traversal filtering (push down if possible)</li> </ul> <h4 id="profile-runtime-performance-analysis" class="position-relative d-flex align-items-center group"> <span>PROFILE: Runtime Performance Analysis</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="profile-runtime-performance-analysis" aria-haspopup="dialog" aria-label="Share link: PROFILE: Runtime Performance Analysis"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>PROFILE executes the query and provides detailed timing information:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="py">PROFILE</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="w"> </span><span class="p">{</span><span class="py">id</span><span class="p">:</span><span class="w"> </span><span class="nv">$user_id</span><span class="p">})</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="err">*</span><span class="nc">1</span><span class="err">.</span><span class="mf">.3</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">count</span><span class="p">(</span><span class="err">*</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">purchase_paths</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Output</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">Execution Profile: </span></span><span class="line"><span class="cl"> IndexSeek (User.id): 0.05ms, 1 row </span></span><span class="line"><span class="cl"> VariableLengthExpand: 24.3ms, 1,247 rows </span></span><span class="line"><span class="cl"> - Path length 1: 12 rows (0.8ms) </span></span><span class="line"><span class="cl"> - Path length 2: 234 rows (8.2ms) </span></span><span class="line"><span class="cl"> - Path length 3: 1,001 rows (15.3ms) </span></span><span class="line"><span class="cl"> Aggregate: 3.1ms, 87 groups </span></span><span class="line"><span class="cl"> Total: 27.45ms </span></span></code></pre></div><p><strong>Key metrics</strong>:</p> <ul> <li><strong>Time per operation</strong>: Identify bottlenecks</li> <li><strong>Row counts</strong>: Detect unexpected cardinality</li> <li><strong>Cache hit rates</strong>: Memory efficiency</li> <li><strong>Index usage</strong>: Verify indexes are used</li> </ul> <h4 id="python-client-profiling" class="position-relative d-flex align-items-center group"> <span>Python Client Profiling</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="python-client-profiling" aria-haspopup="dialog" aria-label="Share link: Python Client Profiling"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">geode_client</span> <span class="kn">import</span> <span class="n">Client</span> </span></span><span class="line"><span class="cl"><span class="kn">import</span> <span class="nn">asyncio</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">async</span> <span class="k">def</span> <span class="nf">profile_query</span><span class="p">():</span> </span></span><span class="line"><span class="cl"> <span class="n">client</span> <span class="o">=</span> <span class="n">Client</span><span class="p">(</span><span class="n">host</span><span class="o">=</span><span class="s2">&#34;localhost&#34;</span><span class="p">,</span> <span class="n">port</span><span class="o">=</span><span class="mi">3141</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> <span class="k">async</span> <span class="k">with</span> <span class="n">client</span><span class="o">.</span><span class="n">connection</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="n">result</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s2">&#34;&#34;&#34; </span></span></span><span class="line"><span class="cl"><span class="s2"> PROFILE </span></span></span><span class="line"><span class="cl"><span class="s2"> MATCH (p:Product) </span></span></span><span class="line"><span class="cl"><span class="s2"> WHERE p.category = $cat </span></span></span><span class="line"><span class="cl"><span class="s2"> RETURN p.name, p.price </span></span></span><span class="line"><span class="cl"><span class="s2"> &#34;&#34;&#34;</span><span class="p">,</span> <span class="p">{</span><span class="s2">&#34;cat&#34;</span><span class="p">:</span> <span class="s2">&#34;Electronics&#34;</span><span class="p">})</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"> <span class="c1"># Access profiling information</span> </span></span><span class="line"><span class="cl"> <span class="nb">print</span><span class="p">(</span><span class="sa">f</span><span class="s2">&#34;Execution time: </span><span class="si">{</span><span class="n">result</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">total_time_ms</span><span class="si">}</span><span class="s2">ms&#34;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> <span class="nb">print</span><span class="p">(</span><span class="sa">f</span><span class="s2">&#34;Rows returned: </span><span class="si">{</span><span class="n">result</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">rows_returned</span><span class="si">}</span><span class="s2">&#34;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"> <span class="k">for</span> <span class="n">stage</span> <span class="ow">in</span> <span class="n">result</span><span class="o">.</span><span class="n">profile</span><span class="o">.</span><span class="n">stages</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="nb">print</span><span class="p">(</span><span class="sa">f</span><span class="s2">&#34;</span><span class="si">{</span><span class="n">stage</span><span class="o">.</span><span class="n">name</span><span class="si">}</span><span class="s2">: </span><span class="si">{</span><span class="n">stage</span><span class="o">.</span><span class="n">time_ms</span><span class="si">}</span><span class="s2">ms (</span><span class="si">{</span><span class="n">stage</span><span class="o">.</span><span class="n">rows</span><span class="si">}</span><span class="s2"> rows)&#34;</span><span class="p">)</span> </span></span></code></pre></div> <h3 id="performance-optimization-techniques" class="position-relative d-flex align-items-center group"> <span>Performance Optimization Techniques</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="performance-optimization-techniques" aria-haspopup="dialog" aria-label="Share link: Performance Optimization Techniques"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3> <h4 id="indexing-strategies" class="position-relative d-flex align-items-center group"> <span>Indexing Strategies</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="indexing-strategies" aria-haspopup="dialog" aria-label="Share link: Indexing Strategies"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>B-Tree Indexes for Equality and Range Queries</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Create</span><span class="w"> </span><span class="py">indexes</span><span class="w"> </span><span class="kd">on</span><span class="w"> </span><span class="py">frequently</span><span class="w"> </span><span class="py">filtered</span><span class="w"> </span><span class="py">properties</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">CREATE</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">user_email</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">User</span><span class="p">(</span><span class="py">email</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">CREATE</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">product_price</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">Product</span><span class="p">(</span><span class="py">price</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">CREATE</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">order_date</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">Order</span><span class="p">(</span><span class="py">date</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">Index</span><span class="w"> </span><span class="py">usage</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="w"> </span><span class="p">{</span><span class="py">email</span><span class="p">:</span><span class="w"> </span><span class="nv">$email</span><span class="p">})</span><span class="w"> </span><span class="err">--</span><span class="w"> </span><span class="nc">Uses</span><span class="w"> </span><span class="py">user_email</span><span class="w"> </span><span class="py">index</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">price</span><span class="w"> </span><span class="py">BETWEEN</span><span class="w"> </span><span class="py">100</span><span class="w"> </span><span class="py">AND</span><span class="w"> </span><span class="py">500</span><span class="w"> </span><span class="err">--</span><span class="w"> </span><span class="py">Uses</span><span class="w"> </span><span class="py">product_price</span><span class="w"> </span><span class="py">index</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Composite Indexes</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Index</span><span class="w"> </span><span class="py">multiple</span><span class="w"> </span><span class="py">properties</span><span class="w"> </span><span class="py">together</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">CREATE</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">product_category_price</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">Product</span><span class="p">(</span><span class="py">category</span><span class="p">,</span><span class="w"> </span><span class="py">price</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">Efficient</span><span class="w"> </span><span class="py">for</span><span class="w"> </span><span class="py">queries</span><span class="w"> </span><span class="py">filtering</span><span class="w"> </span><span class="py">both</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="w"> </span><span class="p">{</span><span class="py">category</span><span class="p">:</span><span class="w"> </span><span class="err">&#39;</span><span class="nc">Electronics</span><span class="err">&#39;</span><span class="p">})</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">price</span><span class="w"> </span><span class="err">&gt;</span><span class="w"> </span><span class="py">100</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Full-Text Search Indexes</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="py">CREATE</span><span class="w"> </span><span class="py">TEXT</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">product_description</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">Product</span><span class="p">(</span><span class="py">description</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WITH</span><span class="w"> </span><span class="p">(</span><span class="py">analyzer</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="err">&#39;</span><span class="py">english</span><span class="err">&#39;</span><span class="p">,</span><span class="w"> </span><span class="py">tokenizer</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="err">&#39;</span><span class="py">standard</span><span class="err">&#39;</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">Fast</span><span class="w"> </span><span class="py">text</span><span class="w"> </span><span class="py">search</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">text_search</span><span class="p">(</span><span class="py">p</span><span class="err">.</span><span class="py">description</span><span class="p">,</span><span class="w"> </span><span class="err">&#39;</span><span class="py">wireless</span><span class="w"> </span><span class="py">bluetooth</span><span class="w"> </span><span class="py">speaker</span><span class="err">&#39;</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">text_rank</span><span class="p">(</span><span class="py">p</span><span class="err">.</span><span class="py">description</span><span class="p">,</span><span class="w"> </span><span class="err">&#39;</span><span class="py">wireless</span><span class="w"> </span><span class="py">bluetooth</span><span class="w"> </span><span class="py">speaker</span><span class="err">&#39;</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">relevance</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">relevance</span><span class="w"> </span><span class="py">DESC</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Vector Indexes (HNSW)</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="py">CREATE</span><span class="w"> </span><span class="py">VECTOR</span><span class="w"> </span><span class="py">INDEX</span><span class="w"> </span><span class="py">product_embeddings</span><span class="w"> </span><span class="py">ON</span><span class="w"> </span><span class="py">Product</span><span class="p">(</span><span class="py">embedding</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WITH</span><span class="w"> </span><span class="p">(</span><span class="py">metric</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="err">&#39;</span><span class="py">cosine</span><span class="err">&#39;</span><span class="p">,</span><span class="w"> </span><span class="py">dimensions</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="py">768</span><span class="p">,</span><span class="w"> </span><span class="py">m</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="py">16</span><span class="p">)</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">Fast</span><span class="w"> </span><span class="py">similarity</span><span class="w"> </span><span class="py">search</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WITH</span><span class="w"> </span><span class="py">p</span><span class="p">,</span><span class="w"> </span><span class="py">vector_similarity</span><span class="p">(</span><span class="py">p</span><span class="err">.</span><span class="py">embedding</span><span class="p">,</span><span class="w"> </span><span class="nv">$query_vector</span><span class="p">,</span><span class="w"> </span><span class="err">&#39;</span><span class="py">cosine</span><span class="err">&#39;</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">similarity</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">similarity</span><span class="w"> </span><span class="err">&gt;</span><span class="w"> </span><span class="py">0</span><span class="mf">.7</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">similarity</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">similarity</span><span class="w"> </span><span class="py">DESC</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">LIMIT</span><span class="w"> </span><span class="py">10</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div> <h4 id="query-optimization-patterns" class="position-relative d-flex align-items-center group"> <span>Query Optimization Patterns</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="query-optimization-patterns" aria-haspopup="dialog" aria-label="Share link: Query Optimization Patterns"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Pattern 1: Filter Before Traversal</strong></p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">BAD</span><span class="p">:</span><span class="w"> </span><span class="nc">Traverse</span><span class="w"> </span><span class="py">then</span><span class="w"> </span><span class="py">filter</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">country</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="err">&#39;</span><span class="py">USA</span><span class="err">&#39;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">GOOD</span><span class="p">:</span><span class="w"> </span><span class="nc">Filter</span><span class="w"> </span><span class="py">then</span><span class="w"> </span><span class="py">traverse</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="w"> </span><span class="p">{</span><span class="py">country</span><span class="p">:</span><span class="w"> </span><span class="err">&#39;</span><span class="nc">USA</span><span class="err">&#39;</span><span class="p">})</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Pattern 2: Limit Early in Pipeline</strong></p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">BAD</span><span class="p">:</span><span class="w"> </span><span class="nc">Process</span><span class="w"> </span><span class="py">all</span><span class="w"> </span><span class="py">then</span><span class="w"> </span><span class="py">limit</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">FRIEND</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">friend</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">LIKES</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Post</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">title</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">created_at</span><span class="w"> </span><span class="py">DESC</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">LIMIT</span><span class="w"> </span><span class="py">10</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">GOOD</span><span class="p">:</span><span class="w"> </span><span class="nc">Limit</span><span class="w"> </span><span class="py">intermediate</span><span class="w"> </span><span class="py">results</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">FRIEND</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">friend</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WITH</span><span class="w"> </span><span class="py">friend</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">LIMIT</span><span class="w"> </span><span class="py">100</span><span class="w"> </span><span class="err">--</span><span class="w"> </span><span class="py">Limit</span><span class="w"> </span><span class="py">before</span><span class="w"> </span><span class="py">expensive</span><span class="w"> </span><span class="py">traversal</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">friend</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">LIKES</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Post</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">title</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">ORDER</span><span class="w"> </span><span class="py">BY</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">created_at</span><span class="w"> </span><span class="py">DESC</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">LIMIT</span><span class="w"> </span><span class="py">10</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Pattern 3: Avoid Cartesian Products</strong></p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">BAD</span><span class="p">:</span><span class="w"> </span><span class="nc">Creates</span><span class="w"> </span><span class="py">cartesian</span><span class="w"> </span><span class="py">product</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">),</span><span class="w"> </span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WHERE</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">preference</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">category</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">GOOD</span><span class="p">:</span><span class="w"> </span><span class="nc">Use</span><span class="w"> </span><span class="py">relationship</span><span class="w"> </span><span class="py">or</span><span class="w"> </span><span class="py">index</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">INTERESTED_IN</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">cat</span><span class="p">:</span><span class="nc">Category</span><span class="p">)</span><span class="err">&lt;-</span><span class="p">[:</span><span class="nc">IN_CATEGORY</span><span class="p">]</span><span class="err">-</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">p</span><span class="err">.</span><span class="py">name</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><p><strong>Pattern 4: Use Aggregation Efficiently</strong></p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">BAD</span><span class="p">:</span><span class="w"> </span><span class="nc">Collect</span><span class="w"> </span><span class="py">all</span><span class="w"> </span><span class="py">then</span><span class="w"> </span><span class="py">count</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">WITH</span><span class="w"> </span><span class="py">u</span><span class="p">,</span><span class="w"> </span><span class="py">collect</span><span class="p">(</span><span class="py">p</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">products</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">size</span><span class="p">(</span><span class="py">products</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">purchase_count</span><span class="err">;</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">GOOD</span><span class="p">:</span><span class="w"> </span><span class="nc">Count</span><span class="w"> </span><span class="py">directly</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">MATCH</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">PURCHASED</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">p</span><span class="p">:</span><span class="nc">Product</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">RETURN</span><span class="w"> </span><span class="py">u</span><span class="err">.</span><span class="py">name</span><span class="p">,</span><span class="w"> </span><span class="py">count</span><span class="p">(</span><span class="py">p</span><span class="p">)</span><span class="w"> </span><span class="py">AS</span><span class="w"> </span><span class="py">purchase_count</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div> <h4 id="connection-pooling" class="position-relative d-flex align-items-center group"> <span>Connection Pooling</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="connection-pooling" aria-haspopup="dialog" aria-label="Share link: Connection Pooling"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Connection pooling improves client performance by reusing connections:</p> <p><strong>Python Client with Pooling</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">geode_client</span> <span class="kn">import</span> <span class="n">Client</span><span class="p">,</span> <span class="n">ConnectionPool</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Create connection pool</span> </span></span><span class="line"><span class="cl"><span class="n">pool</span> <span class="o">=</span> <span class="n">ConnectionPool</span><span class="p">(</span> </span></span><span class="line"><span class="cl"> <span class="n">host</span><span class="o">=</span><span class="s2">&#34;localhost&#34;</span><span class="p">,</span> </span></span><span class="line"><span class="cl"> <span class="n">port</span><span class="o">=</span><span class="mi">3141</span><span class="p">,</span> </span></span><span class="line"><span class="cl"> <span class="n">min_connections</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> </span></span><span class="line"><span class="cl"> <span class="n">max_connections</span><span class="o">=</span><span class="mi">50</span><span class="p">,</span> </span></span><span class="line"><span class="cl"> <span class="n">max_idle_time</span><span class="o">=</span><span class="mi">300</span> <span class="c1"># seconds</span> </span></span><span class="line"><span class="cl"><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">async</span> <span class="k">def</span> <span class="nf">query_with_pool</span><span class="p">():</span> </span></span><span class="line"><span class="cl"> <span class="c1"># Reuses existing connection from pool</span> </span></span><span class="line"><span class="cl"> <span class="k">async</span> <span class="k">with</span> <span class="n">pool</span><span class="o">.</span><span class="n">acquire</span><span class="p">()</span> <span class="k">as</span> <span class="n">client</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="n">result</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="k">await</span> <span class="n">client</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s2">&#34;MATCH (n:User) RETURN count(n)&#34;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="n">result</span><span class="o">.</span><span class="n">bindings</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="s1">&#39;count&#39;</span><span class="p">]</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Pool improves throughput; benchmark your workload</span> </span></span><span class="line"><span class="cl"><span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">10000</span><span class="p">):</span> </span></span><span class="line"><span class="cl"> <span class="k">await</span> <span class="n">query_with_pool</span><span class="p">()</span> </span></span></code></pre></div><p><strong>Go Client Connection Management</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go"><span class="line"><span class="cl"><span class="kn">import</span> <span class="s">&#34;geodedb.com/geode&#34;</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1">// Connection pool configured automatically </span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="nx">db</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">sql</span><span class="p">.</span><span class="nf">Open</span><span class="p">(</span><span class="s">&#34;geode&#34;</span><span class="p">,</span> <span class="s">&#34;quic://localhost:3141&#34;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="k">if</span> <span class="nx">err</span> <span class="o">!=</span> <span class="kc">nil</span> <span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="nx">log</span><span class="p">.</span><span class="nf">Fatal</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="p">}</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1">// Set pool parameters </span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="nx">db</span><span class="p">.</span><span class="nf">SetMaxOpenConns</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="nx">db</span><span class="p">.</span><span class="nf">SetMaxIdleConns</span><span class="p">(</span><span class="mi">10</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="nx">db</span><span class="p">.</span><span class="nf">SetConnMaxLifetime</span><span class="p">(</span><span class="nx">time</span><span class="p">.</span><span class="nx">Minute</span> <span class="o">*</span> <span class="mi">5</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1">// Queries automatically use pool </span></span></span><span class="line"><span class="cl"><span class="c1"></span><span class="nx">rows</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">db</span><span class="p">.</span><span class="nf">Query</span><span class="p">(</span><span class="s">&#34;MATCH (u:User) RETURN u.name&#34;</span><span class="p">)</span> </span></span></code></pre></div> <h4 id="batch-operations" class="position-relative d-flex align-items-center group"> <span>Batch Operations</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="batch-operations" aria-haspopup="dialog" aria-label="Share link: Batch Operations"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p>Batch multiple operations to reduce round-trip latency:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="k">async</span> <span class="k">def</span> <span class="nf">insert_users_batch</span><span class="p">(</span><span class="n">users</span><span class="p">):</span> </span></span><span class="line"><span class="cl"> <span class="n">client</span> <span class="o">=</span> <span class="n">Client</span><span class="p">(</span><span class="n">host</span><span class="o">=</span><span class="s2">&#34;localhost&#34;</span><span class="p">,</span> <span class="n">port</span><span class="o">=</span><span class="mi">3141</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> <span class="k">async</span> <span class="k">with</span> <span class="n">client</span><span class="o">.</span><span class="n">connection</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="c1"># Batch insert with transaction</span> </span></span><span class="line"><span class="cl"> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">begin</span><span class="p">()</span> </span></span><span class="line"><span class="cl"> <span class="k">try</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="k">for</span> <span class="n">batch</span> <span class="ow">in</span> <span class="n">chunk</span><span class="p">(</span><span class="n">users</span><span class="p">,</span> <span class="mi">1000</span><span class="p">):</span> </span></span><span class="line"><span class="cl"> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">&#34;&#34;&#34; </span></span></span><span class="line"><span class="cl"><span class="s2"> UNWIND $users AS user_data </span></span></span><span class="line"><span class="cl"><span class="s2"> CREATE (u:User { </span></span></span><span class="line"><span class="cl"><span class="s2"> id: user_data.id, </span></span></span><span class="line"><span class="cl"><span class="s2"> name: user_data.name, </span></span></span><span class="line"><span class="cl"><span class="s2"> email: user_data.email </span></span></span><span class="line"><span class="cl"><span class="s2"> }) </span></span></span><span class="line"><span class="cl"><span class="s2"> &#34;&#34;&#34;</span><span class="p">,</span> <span class="p">{</span><span class="s2">&#34;users&#34;</span><span class="p">:</span> <span class="n">batch</span><span class="p">})</span> </span></span><span class="line"><span class="cl"> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span> </span></span><span class="line"><span class="cl"> <span class="k">except</span> <span class="ne">Exception</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">rollback</span><span class="p">()</span> </span></span><span class="line"><span class="cl"> <span class="k">raise</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Much faster than individual INSERTs</span> </span></span><span class="line"><span class="cl"><span class="k">await</span> <span class="n">insert_users_batch</span><span class="p">(</span><span class="n">user_list</span><span class="p">)</span> <span class="c1"># 10,000 users in 2-3 seconds</span> </span></span></code></pre></div> <h3 id="performance-best-practices" class="position-relative d-flex align-items-center group"> <span>Performance Best Practices</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="performance-best-practices" aria-haspopup="dialog" aria-label="Share link: Performance Best Practices"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3> <h4 id="schema-design-for-performance" class="position-relative d-flex align-items-center group"> <span>Schema Design for Performance</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="schema-design-for-performance" aria-haspopup="dialog" aria-label="Share link: Schema Design for Performance"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><ol> <li><strong>Denormalize Strategically</strong>: Store frequently accessed computed values</li> </ol> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Store</span><span class="w"> </span><span class="py">aggregate</span><span class="w"> </span><span class="py">counts</span><span class="w"> </span><span class="py">for</span><span class="w"> </span><span class="py">fast</span><span class="w"> </span><span class="py">access</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="py">CREATE</span><span class="w"> </span><span class="p">(</span><span class="py">u</span><span class="p">:</span><span class="nc">User</span><span class="w"> </span><span class="p">{</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="py">name</span><span class="p">:</span><span class="w"> </span><span class="err">&#39;</span><span class="nc">Alice</span><span class="err">&#39;</span><span class="p">,</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="py">follower_count</span><span class="p">:</span><span class="w"> </span><span class="nc">1523</span><span class="p">,</span><span class="w"> </span><span class="err">--</span><span class="w"> </span><span class="py">Precomputed</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="py">following_count</span><span class="p">:</span><span class="w"> </span><span class="nc">892</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">})</span><span class="err">;</span><span class="w"> </span></span></span></code></pre></div><ol start="2"> <li><strong>Use Appropriate Relationship Direction</strong>:</li> </ol> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Model</span><span class="w"> </span><span class="py">relationships</span><span class="w"> </span><span class="py">in</span><span class="w"> </span><span class="kd">query</span><span class="w"> </span><span class="nc">direction</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">If</span><span class="w"> </span><span class="py">you</span><span class="w"> </span><span class="py">frequently</span><span class="w"> </span><span class="kd">query</span><span class="w"> </span><span class="s">&#34;who follows X&#34;</span><span class="p">,</span><span class="w"> </span><span class="nc">use</span><span class="p">:</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">(</span><span class="nc">follower</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">FOLLOWS</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">followee</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="err">--</span><span class="w"> </span><span class="py">Not</span><span class="p">:</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">(</span><span class="nc">followee</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="err">-</span><span class="p">[:</span><span class="nc">FOLLOWED_BY</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">follower</span><span class="p">:</span><span class="nc">User</span><span class="p">)</span><span class="w"> </span></span></span></code></pre></div><ol start="3"> <li><strong>Partition Large Graphs</strong>: Use domain-specific nodes as hubs</li> </ol> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="err">--</span><span class="w"> </span><span class="py">Use</span><span class="w"> </span><span class="py">year</span><span class="w"> </span><span class="py">nodes</span><span class="w"> </span><span class="py">to</span><span class="w"> </span><span class="py">partition</span><span class="w"> </span><span class="py">time</span><span class="err">-</span><span class="py">series</span><span class="w"> </span><span class="py">data</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"></span><span class="p">(</span><span class="py">year</span><span class="p">:</span><span class="nc">Year</span><span class="w"> </span><span class="p">{</span><span class="py">year</span><span class="p">:</span><span class="w"> </span><span class="nc">2024</span><span class="p">})</span><span class="err">-</span><span class="p">[:</span><span class="nc">HAS_MONTH</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">month</span><span class="p">:</span><span class="nc">Month</span><span class="w"> </span><span class="p">{</span><span class="py">month</span><span class="p">:</span><span class="w"> </span><span class="nc">3</span><span class="p">})</span><span class="w"> </span></span></span><span class="line"><span class="cl"><span class="w"> </span><span class="err">-</span><span class="p">[:</span><span class="nc">CONTAINS</span><span class="p">]</span><span class="err">-&gt;</span><span class="p">(</span><span class="py">event</span><span class="p">:</span><span class="nc">Event</span><span class="w"> </span><span class="p">{</span><span class="py">date</span><span class="p">:</span><span class="w"> </span><span class="err">&#39;</span><span class="nc">2024</span><span class="err">-</span><span class="py">03</span><span class="err">-</span><span class="py">15</span><span class="err">&#39;</span><span class="p">})</span><span class="w"> </span></span></span></code></pre></div> <h4 id="monitoring-and-metrics" class="position-relative d-flex align-items-center group"> <span>Monitoring and Metrics</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="monitoring-and-metrics" aria-haspopup="dialog" aria-label="Share link: Monitoring and Metrics"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Built-in Metrics</strong> (exposed via Prometheus):</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="c1"># Query Geode metrics endpoint</span> </span></span><span class="line"><span class="cl">curl http://localhost:9090/metrics </span></span></code></pre></div><p><strong>Key metrics to monitor</strong>:</p> <ul> <li><code>geode_queries_total</code>: Total queries executed</li> <li><code>geode_query_duration_seconds</code>: Query latency distribution</li> <li><code>geode_connections_active</code>: Active client connections</li> <li><code>geode_cache_hits_total</code>: Cache effectiveness</li> <li><code>geode_index_seeks_total</code>: Index usage frequency</li> <li><code>geode_transactions_active</code>: Concurrent transactions</li> </ul> <p><strong>Python monitoring integration</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="kn">from</span> <span class="nn">prometheus_client</span> <span class="kn">import</span> <span class="n">start_http_server</span><span class="p">,</span> <span class="n">Counter</span><span class="p">,</span> <span class="n">Histogram</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Custom application metrics</span> </span></span><span class="line"><span class="cl"><span class="n">query_counter</span> <span class="o">=</span> <span class="n">Counter</span><span class="p">(</span><span class="s1">&#39;app_geode_queries&#39;</span><span class="p">,</span> <span class="s1">&#39;Geode queries executed&#39;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="n">query_duration</span> <span class="o">=</span> <span class="n">Histogram</span><span class="p">(</span><span class="s1">&#39;app_geode_query_duration&#39;</span><span class="p">,</span> <span class="s1">&#39;Query execution time&#39;</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="nd">@query_duration.time</span><span class="p">()</span> </span></span><span class="line"><span class="cl"><span class="k">async</span> <span class="k">def</span> <span class="nf">execute_query</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">params</span><span class="p">):</span> </span></span><span class="line"><span class="cl"> <span class="n">query_counter</span><span class="o">.</span><span class="n">inc</span><span class="p">()</span> </span></span><span class="line"><span class="cl"> <span class="n">client</span> <span class="o">=</span> <span class="n">Client</span><span class="p">(</span><span class="n">host</span><span class="o">=</span><span class="s2">&#34;localhost&#34;</span><span class="p">,</span> <span class="n">port</span><span class="o">=</span><span class="mi">3141</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> <span class="k">async</span> <span class="k">with</span> <span class="n">client</span><span class="o">.</span><span class="n">connection</span><span class="p">()</span> <span class="k">as</span> <span class="n">conn</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="k">await</span> <span class="n">conn</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="n">query</span><span class="p">,</span> <span class="n">params</span><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Start metrics server</span> </span></span><span class="line"><span class="cl"><span class="n">start_http_server</span><span class="p">(</span><span class="mi">8000</span><span class="p">)</span> </span></span></code></pre></div> <h4 id="capacity-planning" class="position-relative d-flex align-items-center group"> <span>Capacity Planning</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="capacity-planning" aria-haspopup="dialog" aria-label="Share link: Capacity Planning"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Estimate resource requirements</strong>:</p> <p><strong>Memory</strong>:</p> <ul> <li>Base: <code>nodes × 256 bytes + relationships × 128 bytes</code></li> <li>Indexes: <code>20-50% overhead per indexed property</code></li> <li>HNSW: <code>vectors × dimensions × 4 × (1 + m × 16)</code></li> <li>Working set: Keep hot data in RAM</li> </ul> <p><strong>Storage</strong>:</p> <ul> <li>Graph data: <code>nodes × 512 bytes + rels × 256 bytes</code></li> <li>WAL: 10-20% of database size</li> <li>Indexes: 30-100% of data size (varies by index type)</li> </ul> <p><strong>CPU</strong>:</p> <ul> <li>2-4 cores: Development and testing</li> <li>8-16 cores: Production workloads (benchmark dependent)</li> <li>32+ cores: High-throughput workloads (benchmark dependent)</li> </ul> <p><strong>Example calculation</strong> (1M nodes, 5M relationships):</p> <ul> <li>Memory: ~1.5GB graph + ~2GB indexes = 3.5GB minimum</li> <li>Storage: ~2.5GB graph + ~2GB indexes = 5GB total</li> <li>CPU: 8 cores for moderate workloads; benchmark for your workload</li> </ul> <h3 id="troubleshooting-performance-issues" class="position-relative d-flex align-items-center group"> <span>Troubleshooting Performance Issues</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="troubleshooting-performance-issues" aria-haspopup="dialog" aria-label="Share link: Troubleshooting Performance Issues"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3> <h4 id="slow-queries" class="position-relative d-flex align-items-center group"> <span>Slow Queries</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="slow-queries" aria-haspopup="dialog" aria-label="Share link: Slow Queries"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Symptom</strong>: Queries taking seconds to complete</p> <p><strong>Diagnosis</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql"><span class="line"><span class="cl"><span class="py">PROFILE</span><span class="w"> </span><span class="p">[</span><span class="py">your</span><span class="w"> </span><span class="py">slow</span><span class="w"> </span><span class="kd">query</span><span class="p">]</span><span class="w"> </span></span></span></code></pre></div><p><strong>Common causes</strong>:</p> <ol> <li>Missing indexes → Add appropriate index</li> <li>Cartesian products → Restructure query with relationships</li> <li>Excessive intermediate results → Add LIMIT clauses</li> <li>Full table scans → Filter earlier in pipeline</li> </ol> <h4 id="high-memory-usage" class="position-relative d-flex align-items-center group"> <span>High Memory Usage</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="high-memory-usage" aria-haspopup="dialog" aria-label="Share link: High Memory Usage"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Symptom</strong>: Server memory consumption growing over time</p> <p><strong>Diagnosis</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"><span class="c1"># Check Geode memory stats</span> </span></span><span class="line"><span class="cl">curl http://localhost:9090/metrics <span class="p">|</span> grep memory </span></span></code></pre></div><p><strong>Solutions</strong>:</p> <ol> <li>Tune cache size configuration</li> <li>Review index memory usage</li> <li>Close idle connections</li> <li>Implement result pagination</li> </ol> <h4 id="connection-pool-exhaustion" class="position-relative d-flex align-items-center group"> <span>Connection Pool Exhaustion</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="connection-pool-exhaustion" aria-haspopup="dialog" aria-label="Share link: Connection Pool Exhaustion"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h4><p><strong>Symptom</strong>: &ldquo;Too many connections&rdquo; errors</p> <p><strong>Solutions</strong>:</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="cl"><span class="c1"># Increase pool size</span> </span></span><span class="line"><span class="cl"><span class="n">pool</span> <span class="o">=</span> <span class="n">ConnectionPool</span><span class="p">(</span> </span></span><span class="line"><span class="cl"> <span class="n">max_connections</span><span class="o">=</span><span class="mi">100</span><span class="p">,</span> <span class="c1"># Increased from 50</span> </span></span><span class="line"><span class="cl"> <span class="n">max_idle_time</span><span class="o">=</span><span class="mi">600</span> <span class="c1"># Keep connections longer</span> </span></span><span class="line"><span class="cl"><span class="p">)</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="c1"># Or decrease connection timeout in app</span> </span></span><span class="line"><span class="cl"><span class="k">async</span> <span class="k">with</span> <span class="n">pool</span><span class="o">.</span><span class="n">acquire</span><span class="p">(</span><span class="n">timeout</span><span class="o">=</span><span class="mf">5.0</span><span class="p">)</span> <span class="k">as</span> <span class="n">client</span><span class="p">:</span> </span></span><span class="line"><span class="cl"> <span class="c1"># Query with timeout</span> </span></span></code></pre></div> <h3 id="related-topics" class="position-relative d-flex align-items-center group"> <span>Related Topics</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="related-topics" aria-haspopup="dialog" aria-label="Share link: Related Topics"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3><ul> <li><strong><a href="/tags/query-optimization/" >Query Optimization</a> </strong>: Deep dive into query tuning</li> <li><strong><a href="/tags/indexing/" >Indexing</a> </strong>: Comprehensive indexing guide</li> <li><strong><a href="/tags/profiling/" >Profiling</a> </strong>: Advanced profiling techniques</li> <li><strong><a href="/tags/scaling/" >Scaling</a> </strong>: Horizontal and vertical scaling strategies</li> <li><strong><a href="/tags/monitoring/" >Monitoring</a> </strong>: Production monitoring and alerting</li> <li><strong><a href="/tags/concurrency/" >Concurrency</a> </strong>: Managing concurrent access</li> </ul> <h3 id="further-reading" class="position-relative d-flex align-items-center group"> <span>Further Reading</span> <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="further-reading" aria-haspopup="dialog" aria-label="Share link: Further Reading"> <i class="fa-sharp-duotone fa-solid fa-share-nodes" aria-hidden="true" style="font-size: 0.8em;"></i> <span class="visually-hidden">Share link</span> </button> </h3><ul> <li><strong>Geode Performance Guide</strong>: <code>/docs/performance/overview/</code></li> <li><strong>Query Optimization Cookbook</strong>: <code>/docs/performance/query-optimization/</code></li> <li><strong>Index Selection Guide</strong>: <code>/docs/indexing/choosing-indexes/</code></li> <li><strong>Prometheus Integration</strong>: <code>/docs/operations/monitoring-with-prometheus/</code></li> <li><strong>Capacity Planning</strong>: <code>/docs/operations/capacity-planning/</code></li> </ul>

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