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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/programs/htcacheclean.html.en
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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+<title>htcacheclean - Clean up the disk cache - Apache HTTP Server Version 2.4</title>
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+<body id="manual-page"><div id="page-header">
+<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
+<p class="apache">Apache HTTP Server Version 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>htcacheclean - Clean up the disk cache</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/programs/htcacheclean.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/programs/htcacheclean.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ko/programs/htcacheclean.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="../tr/programs/htcacheclean.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
+</div>
+
+ <p><code>htcacheclean</code> is used to keep the size of
+ <code class="module"><a href="../mod/mod_cache_disk.html">mod_cache_disk</a></code>'s storage within a given size limit, or
+ limit on inodes in use. This tool can run either manually or in daemon mode.
+ When running in daemon mode, it sleeps in the background and checks the cache
+ directory at regular intervals for cached content to be removed. You can stop
+ the daemon cleanly by sending it a TERM or INT signal. When run manually, a
+ once off check of the cache directory is made for cached content to be
+ removed. If one or more URLs are specified, each URL will be deleted from
+ the cache, if present.</p>
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#synopsis">Synopsis</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#options">Options</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#delete">Deleting a specific URL</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#list">Listing URLs in the Cache</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#exit">Exit Status</a></li>
+</ul><h3>See also</h3><ul class="seealso"><li><code class="module"><a href="../mod/mod_cache_disk.html">mod_cache_disk</a></code></li><li><a href="#comments_section">Comments</a></li></ul></div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="synopsis" id="synopsis">Synopsis</a></h2>
+ <p><code><strong>htcacheclean</strong>
+ [ -<strong>D</strong> ]
+ [ -<strong>v</strong> ]
+ [ -<strong>t</strong> ]
+ [ -<strong>r</strong> ]
+ [ -<strong>n</strong> ]
+ [ -<strong>R</strong><var>round</var> ]
+ -<strong>p</strong><var>path</var>
+ [ -<strong>l</strong><var>limit</var> ]
+ [ -<strong>L</strong><var>limit</var> ]</code></p>
+
+ <p><code><strong>htcacheclean</strong>
+ [ -<strong>n</strong> ]
+ [ -<strong>t</strong> ]
+ [ -<strong>i</strong> ]
+ [ -<strong>P</strong><var>pidfile</var> ]
+ [ -<strong>R</strong><var>round</var> ]
+ -<strong>d</strong><var>interval</var>
+ -<strong>p</strong><var>path</var>
+ [ -<strong>l</strong><var>limit</var> ]
+ [ -<strong>L</strong><var>limit</var> ]</code></p>
+
+ <p><code><strong>htcacheclean</strong>
+ [ -<strong>v</strong> ]
+ [ -<strong>R</strong><var>round</var> ]
+ -<strong>p</strong><var>path</var>
+ [ -<strong>a</strong> ]
+ [ -<strong>A</strong> ]</code></p>
+
+ <p><code><strong>htcacheclean</strong>
+ [ -<strong>D</strong> ]
+ [ -<strong>v</strong> ]
+ [ -<strong>t</strong> ]
+ [ -<strong>R</strong><var>round</var> ]
+ -<strong>p</strong><var>path</var>
+ <var>url</var></code></p>
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="options" id="options">Options</a></h2>
+ <dl>
+ <dt><code>-d<var>interval</var></code></dt>
+ <dd>Daemonize and repeat cache cleaning every <var>interval</var> minutes.
+ This option is mutually exclusive with the <code>-D</code>, <code>-v</code>
+ and <code>-r</code> options. To shutdown the daemon cleanly, just send it
+ a <code>SIGTERM</code> or <code>SIGINT</code>.</dd>
+
+ <dt><code>-D</code></dt>
+ <dd>Do a dry run and don't delete anything. This option is mutually
+ exclusive with the <code>-d</code> option. When doing a dry run and
+ deleting directories with <code>-t</code>, the inodes reported deleted
+ in the stats cannot take into account the directories deleted, and will
+ be marked as an estimate.</dd>
+
+ <dt><code>-v</code></dt>
+ <dd>Be verbose and print statistics. This option is mutually exclusive
+ with the <code>-d</code> option.</dd>
+
+ <dt><code>-r</code></dt>
+ <dd>Clean thoroughly. This assumes that the Apache web server is
+ not running (otherwise you may get garbage in the cache). This option
+ is mutually exclusive with the <code>-d</code> option and implies
+ the <code>-t</code> option.</dd>
+
+ <dt><code>-n</code></dt>
+ <dd>Be nice. This causes slower processing in favour of other
+ processes. <code>htcacheclean</code> will sleep from time to time
+ so that (a) the disk IO will be delayed and (b) the kernel can schedule
+ other processes in the meantime.</dd>
+
+ <dt><code>-t</code></dt>
+ <dd>Delete all empty directories. By default only cache files are
+ removed, however with some configurations the large number of
+ directories created may require attention. If your configuration
+ requires a very large number of directories, to the point that
+ inode or file allocation table exhaustion may become an issue, use
+ of this option is advised.</dd>
+
+ <dt><code>-p<var>path</var></code></dt>
+ <dd>Specify <var>path</var> as the root directory of the disk cache. This
+ should be the same value as specified with the <code class="directive"><a href="../mod/mod_cache_disk.html#cacheroot">CacheRoot</a></code> directive.</dd>
+
+ <dt><code>-P<var>pidfile</var></code></dt>
+ <dd>Specify <var>pidfile</var> as the name of the file to write the
+ process ID to when daemonized.</dd>
+
+ <dt><code>-R<var>round</var></code></dt>
+ <dd>Specify <var>round</var> as the amount to round sizes up to, to
+ compensate for disk block sizes. Set to the block size of the cache
+ partition.</dd>
+
+ <dt><code>-l<var>limit</var></code></dt>
+ <dd>Specify <var>limit</var> as the total disk cache size limit. The value
+ is expressed in bytes by default (or attaching <code>B</code> to the
+ number). Attach <code>K</code> for Kbytes, <code>M</code> for
+ MBytes or <code>G</code> for Gbytes.</dd>
+
+ <dt><code>-L<var>limit</var></code></dt>
+ <dd>Specify <var>limit</var> as the total disk cache inode limit.
+ <code>K</code>, <code>M</code> or <code>G</code> suffix can also be
+ used.</dd>
+
+ <dt><code>-i</code></dt>
+ <dd>Be intelligent and run only when there was a modification of the disk
+ cache. This option is only possible together with the <code>-d</code>
+ option.</dd>
+
+ <dt><code>-a</code></dt>
+ <dd>List the URLs currently stored in the cache. Variants of the same URL
+ will be listed once for each variant.</dd>
+
+ <dt><code>-A</code></dt>
+ <dd>List the URLs currently stored in the cache, along with their
+ attributes in the following order: url, header size, body size, status,
+ entity version, date, expiry, request time, response time, body present,
+ head request.</dd>
+ </dl>
+
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="delete" id="delete">Deleting a specific URL</a></h2>
+ <p>If <code>htcacheclean</code> is passed one or more URLs, each URL will
+ be deleted from the cache. If multiple variants of an URL exists, all
+ variants would be deleted.</p>
+
+ <p>When a reverse proxied URL is to be deleted, the effective URL is
+ constructed from the <strong>Host</strong> header, the
+ <strong>port</strong>, the <strong>path</strong> and the
+ <strong>query</strong>. Note the '?' in the URL must always be specified
+ explicitly, whether a query string is present or not. For example, an
+ attempt to delete the path <strong>/</strong> from the server
+ <strong>localhost</strong>, the URL to delete would be
+ <strong>http://localhost:80/?</strong>.</p>
+
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="list" id="list">Listing URLs in the Cache</a></h2>
+ <p>By passing the <code>-a</code> or <code>-A</code> options to
+ <code>htcacheclean</code>, the URLs within the cache will be listed
+ as they are found, one URL per line. The <code>-A</code> option
+ dumps the full cache entry after the URL, with fields in the
+ following order:</p>
+
+ <dl>
+ <dt>url</dt><dd>The URL of the entry.</dd>
+ <dt>header size</dt><dd>The size of the header in bytes.</dd>
+ <dt>body size</dt><dd>The size of the body in bytes.</dd>
+ <dt>status</dt><dd>Status of the cached response.</dd>
+ <dt>entity version</dt><dd>The number of times this entry has been
+ revalidated without being deleted.</dd>
+ <dt>date</dt><dd>Date of the response.</dd>
+ <dt>expiry</dt><dd>Expiry date of the response.</dd>
+ <dt>request time</dt><dd>Time of the start of the request.</dd>
+ <dt>response time</dt><dd>Time of the end of the request.</dd>
+ <dt>body present</dt><dd>If 0, no body is stored with this request,
+ 1 otherwise.</dd>
+ <dt>head request</dt><dd>If 1, the entry contains a cached HEAD
+ request with no body, 0 otherwise.</dd>
+ </dl>
+
+</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="section">
+<h2><a name="exit" id="exit">Exit Status</a></h2>
+ <p><code>htcacheclean</code> returns a zero status ("true") if all
+ operations were successful, <code>1</code> otherwise. If an URL is
+ specified, and the URL was cached and successfully removed,
+ <code>0</code> is returned, <code>2</code> otherwise. If an error
+ occurred during URL removal, <code>1</code> is returned.</p>
+</div></div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/programs/htcacheclean.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/programs/htcacheclean.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ko/programs/htcacheclean.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="../tr/programs/htcacheclean.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
+</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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