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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Chapter 14. Performance Tips</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="locking-indexes.html" title="13.7. Locking and Indexes" /><link rel="next" href="using-explain.html" title="14.1. Using EXPLAIN" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">Chapter 14. Performance Tips</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="locking-indexes.html" title="13.7. Locking and Indexes">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql.html" title="Part II. The SQL Language">Up</a></td><th width="60%" align="center">Part II. The SQL Language</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="using-explain.html" title="14.1. Using EXPLAIN">Next</a></td></tr></table><hr /></div><div class="chapter" id="PERFORMANCE-TIPS"><div class="titlepage"><div><div><h2 class="title">Chapter 14. Performance Tips</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="using-explain.html">14.1. Using <code class="command">EXPLAIN</code></a></span></dt><dd><dl><dt><span class="sect2"><a href="using-explain.html#USING-EXPLAIN-BASICS">14.1.1. <code class="command">EXPLAIN</code> Basics</a></span></dt><dt><span class="sect2"><a href="using-explain.html#USING-EXPLAIN-ANALYZE">14.1.2. <code class="command">EXPLAIN ANALYZE</code></a></span></dt><dt><span class="sect2"><a href="using-explain.html#USING-EXPLAIN-CAVEATS">14.1.3. Caveats</a></span></dt></dl></dd><dt><span class="sect1"><a href="planner-stats.html">14.2. Statistics Used by the Planner</a></span></dt><dd><dl><dt><span class="sect2"><a href="planner-stats.html#id-1.5.13.5.3">14.2.1. Single-Column Statistics</a></span></dt><dt><span class="sect2"><a href="planner-stats.html#PLANNER-STATS-EXTENDED">14.2.2. Extended Statistics</a></span></dt></dl></dd><dt><span class="sect1"><a href="explicit-joins.html">14.3. Controlling the Planner with Explicit <code class="literal">JOIN</code> Clauses</a></span></dt><dt><span class="sect1"><a href="populate.html">14.4. Populating a Database</a></span></dt><dd><dl><dt><span class="sect2"><a href="populate.html#DISABLE-AUTOCOMMIT">14.4.1. Disable Autocommit</a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-COPY-FROM">14.4.2. Use <code class="command">COPY</code></a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-RM-INDEXES">14.4.3. Remove Indexes</a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-RM-FKEYS">14.4.4. Remove Foreign Key Constraints</a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-WORK-MEM">14.4.5. Increase <code class="varname">maintenance_work_mem</code></a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-MAX-WAL-SIZE">14.4.6. Increase <code class="varname">max_wal_size</code></a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-PITR">14.4.7. Disable WAL Archival and Streaming Replication</a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-ANALYZE">14.4.8. Run <code class="command">ANALYZE</code> Afterwards</a></span></dt><dt><span class="sect2"><a href="populate.html#POPULATE-PG-DUMP">14.4.9. Some Notes about <span class="application">pg_dump</span></a></span></dt></dl></dd><dt><span class="sect1"><a href="non-durability.html">14.5. Non-Durable Settings</a></span></dt></dl></div><a id="id-1.5.13.2" class="indexterm"></a><p>
+ Query performance can be affected by many things. Some of these can
+ be controlled by the user, while others are fundamental to the underlying
+ design of the system. This chapter provides some hints about understanding
+ and tuning <span class="productname">PostgreSQL</span> performance.
+ </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="locking-indexes.html" title="13.7. Locking and Indexes">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql.html" title="Part II. The SQL Language">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="using-explain.html" title="14.1. Using EXPLAIN">Next</a></td></tr><tr><td width="40%" align="left" valign="top">13.7. Locking and Indexes </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 14.1. Using <code class="command">EXPLAIN</code></td></tr></table></div></body></html> \ No newline at end of file