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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
| commit | 6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch) | |
| tree | 1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_cache_socache.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.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>
Diffstat (limited to 'docs/manual/mod/mod_cache_socache.html.en')
| -rw-r--r-- | docs/manual/mod/mod_cache_socache.html.en | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_cache_socache.html.en b/docs/manual/mod/mod_cache_socache.html.en new file mode 100644 index 0000000..4f3d06e --- /dev/null +++ b/docs/manual/mod/mod_cache_socache.html.en @@ -0,0 +1,266 @@ +<?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"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_cache_socache - Apache HTTP Server Version 2.4</title> +<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> +<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> +<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<link href="../images/favicon.ico" rel="shortcut icon" /></head> +<body> +<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="<-" alt="<-" src="../images/left.gif" /></a></div> +<div id="path"> +<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_cache_socache</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_cache_socache.html" title="English"> en </a> | +<a href="../fr/mod/mod_cache_socache.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Shared object cache (socache) based storage module for the +HTTP caching filter.</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>cache_socache_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_cache_socache.c</td></tr></table> +<h3>Summary</h3> + + <p><code class="module"><a href="../mod/mod_cache_socache.html">mod_cache_socache</a></code> implements a shared object cache + (socache) based storage manager for <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>.</p> + + <p>The headers and bodies of cached responses are combined, and stored + underneath a single key in the shared object cache. A + <a href="../socache.html">number of implementations</a> of shared object + caches are available to choose from.</p> + + <p>Multiple content negotiated responses can be stored concurrently, + however the caching of partial content is not yet supported by this + module.</p> + + <pre class="prettyprint lang-config"># Turn on caching +CacheSocache shmcb +CacheSocacheMaxSize 102400 +<Location "/foo"> + CacheEnable socache +</Location> + +# Fall back to the disk cache +CacheSocache shmcb +CacheSocacheMaxSize 102400 +<Location "/foo"> + CacheEnable socache + CacheEnable disk +</Location></pre> + + + <div class="note"><h3>Note:</h3> + <p><code class="module"><a href="../mod/mod_cache_socache.html">mod_cache_socache</a></code> requires the services of + <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code>, which must be loaded before + <code class="module"><a href="../mod/mod_cache_socache.html">mod_cache_socache</a></code>.</p> + </div> +</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><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocache">CacheSocache</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocachemaxsize">CacheSocacheMaxSize</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocachemaxtime">CacheSocacheMaxTime</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocachemintime">CacheSocacheMinTime</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocachereadsize">CacheSocacheReadSize</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#cachesocachereadtime">CacheSocacheReadTime</a></li> +</ul> +<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_cache_socache">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_cache_socache">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code></li> +<li><code class="module"><a href="../mod/mod_cache_disk.html">mod_cache_disk</a></code></li> +<li><a href="../caching.html">Caching Guide</a></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="directive-section"><h2><a name="CacheSocache" id="CacheSocache">CacheSocache</a> <a name="cachesocache" id="cachesocache">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The shared object cache implementation to use</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocache <var>type[:args]</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocache</code> directive defines the name of + the shared object cache implementation to use, followed by optional + arguments for that implementation. A <a href="../socache.html">number of + implementations</a> of shared object caches are available to choose + from.</p> + + <pre class="prettyprint lang-config">CacheSocache shmcb</pre> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="CacheSocacheMaxSize" id="CacheSocacheMaxSize">CacheSocacheMaxSize</a> <a name="cachesocachemaxsize" id="cachesocachemaxsize">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The maximum size (in bytes) of an entry to be placed in the +cache</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocacheMaxSize <var>bytes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheSocacheMaxSize 102400</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocacheMaxSize</code> directive sets the + maximum size, in bytes, for the combined headers and body of a document + to be considered for storage in the cache. The larger the headers that + are stored alongside the body, the smaller the body may be.</p> + + <p>The <code class="module"><a href="../mod/mod_cache_socache.html">mod_cache_socache</a></code> module will only attempt to + cache responses that have an explicit content length, or that are small + enough to be written in one pass. This is done to allow the + <code class="module"><a href="../mod/mod_cache_disk.html">mod_cache_disk</a></code> module to have an opportunity to cache + responses larger than those cacheable within + <code class="module"><a href="../mod/mod_cache_socache.html">mod_cache_socache</a></code>.</p> + + <pre class="prettyprint lang-config">CacheSocacheMaxSize 102400</pre> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="CacheSocacheMaxTime" id="CacheSocacheMaxTime">CacheSocacheMaxTime</a> <a name="cachesocachemaxtime" id="cachesocachemaxtime">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The maximum time (in seconds) for a document to be placed in the +cache</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocacheMaxTime <var>seconds</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheSocacheMaxTime 86400</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocacheMaxTime</code> directive sets the + maximum freshness lifetime, in seconds, for a document to be stored in + the cache. This value overrides the freshness lifetime defined for the + document by the HTTP protocol.</p> + + <pre class="prettyprint lang-config">CacheSocacheMaxTime 86400</pre> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="CacheSocacheMinTime" id="CacheSocacheMinTime">CacheSocacheMinTime</a> <a name="cachesocachemintime" id="cachesocachemintime">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The minimum time (in seconds) for a document to be placed in the +cache</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocacheMinTime <var>seconds</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheSocacheMinTime 600</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocacheMinTime</code> directive sets the + amount of seconds beyond the freshness lifetime of the response that the + response should be cached for in the shared object cache. If a response is + only stored for its freshness lifetime, there will be no opportunity to + revalidate the response to make it fresh again.</p> + + <pre class="prettyprint lang-config">CacheSocacheMinTime 600</pre> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="CacheSocacheReadSize" id="CacheSocacheReadSize">CacheSocacheReadSize</a> <a name="cachesocachereadsize" id="cachesocachereadsize">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The minimum size (in bytes) of the document to read and be cached + before sending the data downstream</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocacheReadSize <var>bytes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheSocacheReadSize 0</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocacheReadSize</code> directive sets the + minimum amount of data, in bytes, to be read from the backend before the + data is sent to the client. The default of zero causes all data read of + any size to be passed downstream to the client immediately as it arrives. + Setting this to a higher value causes the disk cache to buffer at least + this amount before sending the result to the client. This can improve + performance when caching content from a slow reverse proxy.</p> + + <p>This directive only takes effect when the data is being saved to the + cache, as opposed to data being served from the cache.</p> + + <pre class="prettyprint lang-config">CacheSocacheReadSize 102400</pre> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="CacheSocacheReadTime" id="CacheSocacheReadTime">CacheSocacheReadTime</a> <a name="cachesocachereadtime" id="cachesocachereadtime">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The minimum time (in milliseconds) that should elapse while reading + before data is sent downstream</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheSocacheReadTime <var>milliseconds</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheSocacheReadTime 0</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache_socache</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.4.5 and later</td></tr> +</table> + <p>The <code class="directive">CacheSocacheReadTime</code> directive sets the minimum amount + of elapsed time that should pass before making an attempt to send data + downstream to the client. During the time period, data will be buffered + before sending the result to the client. This can improve performance when + caching content from a reverse proxy.</p> + + <p>The default of zero disables this option.</p> + + <p>This directive only takes effect when the data is being saved to the + cache, as opposed to data being served from the cache. It is recommended + that this option be used alongside the + <code class="directive"><a href="#cachesocachereadsize">CacheSocacheReadSize</a></code> directive + to ensure that the server does not buffer excessively should data arrive faster + than expected.</p> + + <pre class="prettyprint lang-config">CacheSocacheReadTime 1000</pre> + + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_cache_socache.html" title="English"> en </a> | +<a href="../fr/mod/mod_cache_socache.html" hreflang="fr" rel="alternate" title="Français"> fr </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&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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_cache_socache.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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