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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 20. Server Configuration</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="event-log-registration.html" title="19.12. Registering Event Log on Windows" /><link rel="next" href="config-setting.html" title="20.1. Setting Parameters" /></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 20. Server Configuration</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="event-log-registration.html" title="19.12. Registering Event Log on Windows">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="admin.html" title="Part III. Server Administration">Up</a></td><th width="60%" align="center">Part III. Server Administration</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="config-setting.html" title="20.1. Setting Parameters">Next</a></td></tr></table><hr /></div><div class="chapter" id="RUNTIME-CONFIG"><div class="titlepage"><div><div><h2 class="title">Chapter 20. Server Configuration</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="config-setting.html">20.1. Setting Parameters</a></span></dt><dd><dl><dt><span class="sect2"><a href="config-setting.html#CONFIG-SETTING-NAMES-VALUES">20.1.1. Parameter Names and Values</a></span></dt><dt><span class="sect2"><a href="config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE">20.1.2. Parameter Interaction via the Configuration File</a></span></dt><dt><span class="sect2"><a href="config-setting.html#CONFIG-SETTING-SQL">20.1.3. Parameter Interaction via SQL</a></span></dt><dt><span class="sect2"><a href="config-setting.html#CONFIG-SETTING-SHELL">20.1.4. Parameter Interaction via the Shell</a></span></dt><dt><span class="sect2"><a href="config-setting.html#CONFIG-INCLUDES">20.1.5. Managing Configuration File Contents</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-file-locations.html">20.2. File Locations</a></span></dt><dt><span class="sect1"><a href="runtime-config-connection.html">20.3. Connections and Authentication</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-connection.html#RUNTIME-CONFIG-CONNECTION-SETTINGS">20.3.1. Connection Settings</a></span></dt><dt><span class="sect2"><a href="runtime-config-connection.html#RUNTIME-CONFIG-TCP-SETTINGS">20.3.2. TCP Settings</a></span></dt><dt><span class="sect2"><a href="runtime-config-connection.html#RUNTIME-CONFIG-CONNECTION-AUTHENTICATION">20.3.3. Authentication</a></span></dt><dt><span class="sect2"><a href="runtime-config-connection.html#RUNTIME-CONFIG-CONNECTION-SSL">20.3.4. SSL</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-resource.html">20.4. Resource Consumption</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-MEMORY">20.4.1. Memory</a></span></dt><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-DISK">20.4.2. Disk</a></span></dt><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-KERNEL">20.4.3. Kernel Resource Usage</a></span></dt><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-VACUUM-COST">20.4.4. Cost-based Vacuum Delay</a></span></dt><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-BACKGROUND-WRITER">20.4.5. Background Writer</a></span></dt><dt><span class="sect2"><a href="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-ASYNC-BEHAVIOR">20.4.6. Asynchronous Behavior</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-wal.html">20.5. Write Ahead Log</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-SETTINGS">20.5.1. Settings</a></span></dt><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-CHECKPOINTS">20.5.2. Checkpoints</a></span></dt><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-ARCHIVING">20.5.3. Archiving</a></span></dt><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-RECOVERY">20.5.4. Recovery</a></span></dt><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-ARCHIVE-RECOVERY">20.5.5. Archive Recovery</a></span></dt><dt><span class="sect2"><a href="runtime-config-wal.html#RUNTIME-CONFIG-WAL-RECOVERY-TARGET">20.5.6. Recovery Target</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-replication.html">20.6. Replication</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-replication.html#RUNTIME-CONFIG-REPLICATION-SENDER">20.6.1. Sending Servers</a></span></dt><dt><span class="sect2"><a href="runtime-config-replication.html#RUNTIME-CONFIG-REPLICATION-PRIMARY">20.6.2. Primary Server</a></span></dt><dt><span class="sect2"><a href="runtime-config-replication.html#RUNTIME-CONFIG-REPLICATION-STANDBY">20.6.3. Standby Servers</a></span></dt><dt><span class="sect2"><a href="runtime-config-replication.html#RUNTIME-CONFIG-REPLICATION-SUBSCRIBER">20.6.4. Subscribers</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-query.html">20.7. Query Planning</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-query.html#RUNTIME-CONFIG-QUERY-ENABLE">20.7.1. Planner Method Configuration</a></span></dt><dt><span class="sect2"><a href="runtime-config-query.html#RUNTIME-CONFIG-QUERY-CONSTANTS">20.7.2. Planner Cost Constants</a></span></dt><dt><span class="sect2"><a href="runtime-config-query.html#RUNTIME-CONFIG-QUERY-GEQO">20.7.3. Genetic Query Optimizer</a></span></dt><dt><span class="sect2"><a href="runtime-config-query.html#RUNTIME-CONFIG-QUERY-OTHER">20.7.4. Other Planner Options</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-logging.html">20.8. Error Reporting and Logging</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHERE">20.8.1. Where to Log</a></span></dt><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHEN">20.8.2. When to Log</a></span></dt><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHAT">20.8.3. What to Log</a></span></dt><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-CSVLOG">20.8.4. Using CSV-Format Log Output</a></span></dt><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-JSONLOG">20.8.5. Using JSON-Format Log Output</a></span></dt><dt><span class="sect2"><a href="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-PROC-TITLE">20.8.6. Process Title</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-statistics.html">20.9. Run-time Statistics</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-statistics.html#RUNTIME-CONFIG-CUMULATIVE-STATISTICS">20.9.1. Cumulative Query and Index Statistics</a></span></dt><dt><span class="sect2"><a href="runtime-config-statistics.html#RUNTIME-CONFIG-STATISTICS-MONITOR">20.9.2. Statistics Monitoring</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-autovacuum.html">20.10. Automatic Vacuuming</a></span></dt><dt><span class="sect1"><a href="runtime-config-client.html">20.11. Client Connection Defaults</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-STATEMENT">20.11.1. Statement Behavior</a></span></dt><dt><span class="sect2"><a href="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-FORMAT">20.11.2. Locale and Formatting</a></span></dt><dt><span class="sect2"><a href="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-PRELOAD">20.11.3. Shared Library Preloading</a></span></dt><dt><span class="sect2"><a href="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-OTHER">20.11.4. Other Defaults</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-locks.html">20.12. Lock Management</a></span></dt><dt><span class="sect1"><a href="runtime-config-compatible.html">20.13. Version and Platform Compatibility</a></span></dt><dd><dl><dt><span class="sect2"><a href="runtime-config-compatible.html#RUNTIME-CONFIG-COMPATIBLE-VERSION">20.13.1. Previous PostgreSQL Versions</a></span></dt><dt><span class="sect2"><a href="runtime-config-compatible.html#RUNTIME-CONFIG-COMPATIBLE-CLIENTS">20.13.2. Platform and Client Compatibility</a></span></dt></dl></dd><dt><span class="sect1"><a href="runtime-config-error-handling.html">20.14. Error Handling</a></span></dt><dt><span class="sect1"><a href="runtime-config-preset.html">20.15. Preset Options</a></span></dt><dt><span class="sect1"><a href="runtime-config-custom.html">20.16. Customized Options</a></span></dt><dt><span class="sect1"><a href="runtime-config-developer.html">20.17. Developer Options</a></span></dt><dt><span class="sect1"><a href="runtime-config-short.html">20.18. Short Options</a></span></dt></dl></div><a id="id-1.6.7.2" class="indexterm"></a><p>
There are many configuration parameters that affect the behavior of
the database system. In the first section of this chapter we
describe how to interact with configuration parameters. The subsequent sections
discuss each parameter in detail.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="event-log-registration.html" title="19.12. Registering Event Log on Windows">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="admin.html" title="Part III. Server Administration">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="config-setting.html" title="20.1. Setting Parameters">Next</a></td></tr><tr><td width="40%" align="left" valign="top">19.12. Registering <span class="application">Event Log</span> on <span class="systemitem">Windows</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 20.1. Setting Parameters</td></tr></table></div></body></html>
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