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1<?xml version="1.0" encoding="UTF-8" standalone="no"?>2<!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>29.2. Disk Full Failure</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="disk-usage.html" title="29.1. Determining Disk Usage" /><link rel="next" href="wal.html" title="Chapter 30. Reliability and the Write-Ahead Log" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">29.2. Disk Full Failure</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="disk-usage.html" title="29.1. Determining Disk Usage">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="diskusage.html" title="Chapter 29. Monitoring Disk Usage">Up</a></td><th width="60%" align="center">Chapter 29. Monitoring Disk Usage</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="wal.html" title="Chapter 30. Reliability and the Write-Ahead Log">Next</a></td></tr></table><hr /></div><div class="sect1" id="DISK-FULL"><div class="titlepage"><div><div><h2 class="title" style="clear: both">29.2. Disk Full Failure <a href="#DISK-FULL" class="id_link">#</a></h2></div></div></div><p>3   The most important disk monitoring task of a database administrator4   is to make sure the disk doesn't become full.  A filled data disk will5   not result in data corruption, but it might prevent useful activity6   from occurring. If the disk holding the WAL files grows full, database7   server panic and consequent shutdown might occur.8  </p><p>9   If you cannot free up additional space on the disk by deleting10   other things, you can move some of the database files to other file11   systems by making use of tablespaces. See <a class="xref" href="manage-ag-tablespaces.html" title="23.6. Tablespaces">Section 23.6</a> for more information about that.12  </p><div class="tip"><h3 class="title">Tip</h3><p>13    Some file systems perform badly when they are almost full, so do14    not wait until the disk is completely full to take action.15   </p></div><p>16   If your system supports per-user disk quotas, then the database17   will naturally be subject to whatever quota is placed on the user18   the server runs as.  Exceeding the quota will have the same bad19   effects as running out of disk space entirely.20  </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="disk-usage.html" title="29.1. Determining Disk Usage">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="diskusage.html" title="Chapter 29. Monitoring Disk Usage">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="wal.html" title="Chapter 30. Reliability and the Write-Ahead Log">Next</a></td></tr><tr><td width="40%" align="left" valign="top">29.1. Determining Disk Usage </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> Chapter 30. Reliability and the Write-Ahead Log</td></tr></table></div></body></html>