1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!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>pg_archivecleanup</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="app-initdb.html" title="initdb" /><link rel="next" href="app-pgchecksums.html" title="pg_checksums" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center"><span class="application">pg_archivecleanup</span></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="app-initdb.html" title="initdb">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="reference-server.html" title="PostgreSQL Server Applications">Up</a></td><th width="60%" align="center">PostgreSQL Server Applications</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="app-pgchecksums.html" title="pg_checksums">Next</a></td></tr></table><hr /></div><div class="refentry" id="PGARCHIVECLEANUP"><div class="titlepage"></div><a id="id-1.9.5.4.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle"><span class="application">pg_archivecleanup</span></span></h2><p>pg_archivecleanup — clean up <span class="productname">PostgreSQL</span> WAL archive files</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p id="id-1.9.5.4.4.1"><code class="command">pg_archivecleanup</code> [<em class="replaceable"><code>option</code></em>...] <em class="replaceable"><code>archivelocation</code></em> <em class="replaceable"><code>oldestkeptwalfile</code></em> </p></div></div><div class="refsect1" id="id-1.9.5.4.5"><h2>Description</h2><p>
<span class="application">pg_archivecleanup</span> is designed to be used as an
<code class="literal">archive_cleanup_command</code> to clean up WAL file archives when
running as a standby server (see <a class="xref" href="warm-standby.html" title="27.2. Log-Shipping Standby Servers">Section 27.2</a>).
<span class="application">pg_archivecleanup</span> can also be used as a standalone program to
clean WAL file archives.
</p><p>
To configure a standby
server to use <span class="application">pg_archivecleanup</span>, put this into its
<code class="filename">postgresql.conf</code> configuration file:
</p><pre class="programlisting">
archive_cleanup_command = 'pg_archivecleanup <em class="replaceable"><code>archivelocation</code></em> %r'
</pre><p>
where <em class="replaceable"><code>archivelocation</code></em> is the directory from which WAL segment
files should be removed.
</p><p>
When used within <a class="xref" href="runtime-config-wal.html#GUC-ARCHIVE-CLEANUP-COMMAND">archive_cleanup_command</a>, all WAL files
logically preceding the value of the <code class="literal">%r</code> argument will be removed
from <em class="replaceable"><code>archivelocation</code></em>. This minimizes the number of files
that need to be retained, while preserving crash-restart capability. Use of
this parameter is appropriate if the <em class="replaceable"><code>archivelocation</code></em> is a
transient staging area for this particular standby server, but
<span class="emphasis"><em>not</em></span> when the <em class="replaceable"><code>archivelocation</code></em> is intended as a
long-term WAL archive area, or when multiple standby servers are recovering
from the same archive location.
</p><p>
When used as a standalone program all WAL files logically preceding the
<em class="replaceable"><code>oldestkeptwalfile</code></em> will be removed from <em class="replaceable"><code>archivelocation</code></em>.
In this mode, if you specify a <code class="filename">.partial</code> or <code class="filename">.backup</code>
file name, then only the file prefix will be used as the
<em class="replaceable"><code>oldestkeptwalfile</code></em>. This treatment of <code class="filename">.backup</code>
file name allows you to remove
all WAL files archived prior to a specific base backup without error.
For example, the following example will remove all files older than
WAL file name <code class="filename">000000010000003700000010</code>:
</p><pre class="programlisting">
pg_archivecleanup -d archive 000000010000003700000010.00000020.backup
pg_archivecleanup: keep WAL file "archive/000000010000003700000010" and later
pg_archivecleanup: removing file "archive/00000001000000370000000F"
pg_archivecleanup: removing file "archive/00000001000000370000000E"
</pre><p>
</p><p>
<span class="application">pg_archivecleanup</span> assumes that
<em class="replaceable"><code>archivelocation</code></em> is a directory readable and writable by the
server-owning user.
</p></div><div class="refsect1" id="id-1.9.5.4.6"><h2>Options</h2><p>
<span class="application">pg_archivecleanup</span> accepts the following command-line arguments:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">-d</code></span></dt><dd><p>
Print lots of debug logging output on <code class="filename">stderr</code>.
</p></dd><dt><span class="term"><code class="option">-n</code></span></dt><dd><p>
Print the names of the files that would have been removed on <code class="filename">stdout</code> (performs a dry run).
</p></dd><dt><span class="term"><code class="option">-V</code><br /></span><span class="term"><code class="option">--version</code></span></dt><dd><p>
Print the <span class="application">pg_archivecleanup</span> version and exit.
</p></dd><dt><span class="term"><code class="option">-x</code> <em class="replaceable"><code>extension</code></em></span></dt><dd><p>
Provide an extension
that will be stripped from all file names before deciding if they
should be deleted. This is typically useful for cleaning up archives
that have been compressed during storage, and therefore have had an
extension added by the compression program. For example: <code class="literal">-x
.gz</code>.
</p></dd><dt><span class="term"><code class="option">-?</code><br /></span><span class="term"><code class="option">--help</code></span></dt><dd><p>
Show help about <span class="application">pg_archivecleanup</span> command line
arguments, and exit.
</p></dd></dl></div><p>
</p></div><div class="refsect1" id="id-1.9.5.4.7"><h2>Environment</h2><p>
The environment variable <code class="envar">PG_COLOR</code> specifies whether to use
color in diagnostic messages. Possible values are
<code class="literal">always</code>, <code class="literal">auto</code> and
<code class="literal">never</code>.
</p></div><div class="refsect1" id="id-1.9.5.4.8"><h2>Notes</h2><p>
<span class="application">pg_archivecleanup</span> is designed to work with
<span class="productname">PostgreSQL</span> 8.0 and later when used as a standalone utility,
or with <span class="productname">PostgreSQL</span> 9.0 and later when used as an
archive cleanup command.
</p><p>
<span class="application">pg_archivecleanup</span> is written in C and has an
easy-to-modify source code, with specifically designated sections to modify
for your own needs
</p></div><div class="refsect1" id="id-1.9.5.4.9"><h2>Examples</h2><p>On Linux or Unix systems, you might use:
</p><pre class="programlisting">
archive_cleanup_command = 'pg_archivecleanup -d /mnt/standby/archive %r 2>>cleanup.log'
</pre><p>
where the archive directory is physically located on the standby server,
so that the <code class="varname">archive_command</code> is accessing it across NFS,
but the files are local to the standby.
This will:
</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p>
produce debugging output in <code class="filename">cleanup.log</code>
</p></li><li class="listitem"><p>
remove no-longer-needed files from the archive directory
</p></li></ul></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="app-initdb.html" title="initdb">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="reference-server.html" title="PostgreSQL Server Applications">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="app-pgchecksums.html" title="pg_checksums">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="application">initdb</span> </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"> <span class="application">pg_checksums</span></td></tr></table></div></body></html>
|
