<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Server Configuration</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 8.4.12 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Server Administration" HREF="admin.html"><LINK REL="PREVIOUS" TITLE="Secure TCP/IP Connections with SSH Tunnels" HREF="ssh-tunnels.html"><LINK REL="NEXT" TITLE="Setting Parameters" HREF="config-setting.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2012-05-31T23:30:11"></HEAD ><BODY CLASS="CHAPTER" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" >PostgreSQL 8.4.12 Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="ssh-tunnels.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="runtime.html" >Fast Backward</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="client-authentication.html" >Fast Forward</A ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="top" ><A HREF="config-setting.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="RUNTIME-CONFIG" ></A >Chapter 18. Server Configuration</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT >18.1. <A HREF="config-setting.html" >Setting Parameters</A ></DT ><DT >18.2. <A HREF="runtime-config-file-locations.html" >File Locations</A ></DT ><DT >18.3. <A HREF="runtime-config-connection.html" >Connections and Authentication</A ></DT ><DD ><DL ><DT >18.3.1. <A HREF="runtime-config-connection.html#RUNTIME-CONFIG-CONNECTION-SETTINGS" >Connection Settings</A ></DT ><DT >18.3.2. <A HREF="runtime-config-connection.html#RUNTIME-CONFIG-CONNECTION-SECURITY" >Security and Authentication</A ></DT ></DL ></DD ><DT >18.4. <A HREF="runtime-config-resource.html" >Resource Consumption</A ></DT ><DD ><DL ><DT >18.4.1. <A HREF="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-MEMORY" >Memory</A ></DT ><DT >18.4.2. <A HREF="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-KERNEL" >Kernel Resource Usage</A ></DT ><DT >18.4.3. <A HREF="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-VACUUM-COST" >Cost-Based Vacuum Delay</A ></DT ><DT >18.4.4. <A HREF="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-BACKGROUND-WRITER" >Background Writer</A ></DT ><DT >18.4.5. <A HREF="runtime-config-resource.html#RUNTIME-CONFIG-RESOURCE-ASYNC-BEHAVIOR" >Asynchronous Behavior</A ></DT ></DL ></DD ><DT >18.5. <A HREF="runtime-config-wal.html" >Write Ahead Log</A ></DT ><DD ><DL ><DT >18.5.1. <A HREF="runtime-config-wal.html#RUNTIME-CONFIG-WAL-SETTINGS" >Settings</A ></DT ><DT >18.5.2. <A HREF="runtime-config-wal.html#RUNTIME-CONFIG-WAL-CHECKPOINTS" >Checkpoints</A ></DT ><DT >18.5.3. <A HREF="runtime-config-wal.html#RUNTIME-CONFIG-WAL-ARCHIVING" >Archiving</A ></DT ></DL ></DD ><DT >18.6. <A HREF="runtime-config-query.html" >Query Planning</A ></DT ><DD ><DL ><DT >18.6.1. <A HREF="runtime-config-query.html#RUNTIME-CONFIG-QUERY-ENABLE" >Planner Method Configuration</A ></DT ><DT >18.6.2. <A HREF="runtime-config-query.html#RUNTIME-CONFIG-QUERY-CONSTANTS" >Planner Cost Constants</A ></DT ><DT >18.6.3. <A HREF="runtime-config-query.html#RUNTIME-CONFIG-QUERY-GEQO" >Genetic Query Optimizer</A ></DT ><DT >18.6.4. <A HREF="runtime-config-query.html#RUNTIME-CONFIG-QUERY-OTHER" >Other Planner Options</A ></DT ></DL ></DD ><DT >18.7. <A HREF="runtime-config-logging.html" >Error Reporting and Logging</A ></DT ><DD ><DL ><DT >18.7.1. <A HREF="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHERE" >Where To Log</A ></DT ><DT >18.7.2. <A HREF="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHEN" >When To Log</A ></DT ><DT >18.7.3. <A HREF="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-WHAT" >What To Log</A ></DT ><DT >18.7.4. <A HREF="runtime-config-logging.html#RUNTIME-CONFIG-LOGGING-CSVLOG" >Using CSV-Format Log Output</A ></DT ></DL ></DD ><DT >18.8. <A HREF="runtime-config-statistics.html" >Run-Time Statistics</A ></DT ><DD ><DL ><DT >18.8.1. <A HREF="runtime-config-statistics.html#RUNTIME-CONFIG-STATISTICS-COLLECTOR" >Query and Index Statistics Collector</A ></DT ><DT >18.8.2. <A HREF="runtime-config-statistics.html#RUNTIME-CONFIG-STATISTICS-MONITOR" >Statistics Monitoring</A ></DT ></DL ></DD ><DT >18.9. <A HREF="runtime-config-autovacuum.html" >Automatic Vacuuming</A ></DT ><DT >18.10. <A HREF="runtime-config-client.html" >Client Connection Defaults</A ></DT ><DD ><DL ><DT >18.10.1. <A HREF="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-STATEMENT" >Statement Behavior</A ></DT ><DT >18.10.2. <A HREF="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-FORMAT" >Locale and Formatting</A ></DT ><DT >18.10.3. <A HREF="runtime-config-client.html#RUNTIME-CONFIG-CLIENT-OTHER" >Other Defaults</A ></DT ></DL ></DD ><DT >18.11. <A HREF="runtime-config-locks.html" >Lock Management</A ></DT ><DT >18.12. <A HREF="runtime-config-compatible.html" >Version and Platform Compatibility</A ></DT ><DD ><DL ><DT >18.12.1. <A HREF="runtime-config-compatible.html#RUNTIME-CONFIG-COMPATIBLE-VERSION" >Previous PostgreSQL Versions</A ></DT ><DT >18.12.2. <A HREF="runtime-config-compatible.html#RUNTIME-CONFIG-COMPATIBLE-CLIENTS" >Platform and Client Compatibility</A ></DT ></DL ></DD ><DT >18.13. <A HREF="runtime-config-preset.html" >Preset Options</A ></DT ><DT >18.14. <A HREF="runtime-config-custom.html" >Customized Options</A ></DT ><DT >18.15. <A HREF="runtime-config-developer.html" >Developer Options</A ></DT ><DT >18.16. <A HREF="runtime-config-short.html" >Short Options</A ></DT ></DL ></DIV ><A NAME="AEN24488" ></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 set configuration parameters. The subsequent sections discuss each parameter in detail. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="ssh-tunnels.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="config-setting.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Secure TCP/IP Connections with <SPAN CLASS="APPLICATION" >SSH</SPAN > Tunnels</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="admin.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Setting Parameters</TD ></TR ></TABLE ></DIV ></BODY ></HTML >