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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>73.5. The Initialization Fork</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="storage-vm.html" title="73.4. Visibility Map" /><link rel="next" href="storage-page-layout.html" title="73.6. Database Page Layout" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">73.5. The Initialization Fork</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="storage-vm.html" title="73.4. Visibility Map">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="storage.html" title="Chapter 73. Database Physical Storage">Up</a></td><th width="60%" align="center">Chapter 73. Database Physical Storage</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="storage-page-layout.html" title="73.6. Database Page Layout">Next</a></td></tr></table><hr /></div><div class="sect1" id="STORAGE-INIT"><div class="titlepage"><div><div><h2 class="title" style="clear: both">73.5. The Initialization Fork</h2></div></div></div><a id="id-1.10.24.7.2" class="indexterm"></a><p>
+Each unlogged table, and each index on an unlogged table, has an initialization
+fork. The initialization fork is an empty table or index of the appropriate
+type. When an unlogged table must be reset to empty due to a crash, the
+initialization fork is copied over the main fork, and any other forks are
+erased (they will be recreated automatically as needed).
+</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="storage-vm.html" title="73.4. Visibility Map">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="storage.html" title="Chapter 73. Database Physical Storage">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="storage-page-layout.html" title="73.6. Database Page Layout">Next</a></td></tr><tr><td width="40%" align="left" valign="top">73.4. Visibility Map </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 73.6. Database Page Layout</td></tr></table></div></body></html> \ No newline at end of file