<title>Caching Guide - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div>
<li><img alt="" src="./images/down.gif" /> <a href="#socache-caching">Two-state Key/Value Shared Object Caching</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#file-caching">Specialized File Caching</a></li>
<li><img alt="" src="./images/down.gif" /> <a href="#security">Security Considerations</a></li>
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<div class="section">
<h2><a name="introduction" id="introduction">Introduction</a></h2>
<p>Typically the module will be configured as so;</p>
- <div class="example"><p><code>
-CacheRoot /var/cache/apache/<br />
-CacheEnable disk /<br />
-CacheDirLevels 2<br />
+ <pre class="prettyprint lang-config">
+CacheRoot "/var/cache/apache/"
+CacheEnable disk /
+CacheDirLevels 2
CacheDirLength 1
- </code></p></div>
+ </pre>
+
<p>Importantly, as the cached files are locally stored, operating system
in-memory caching will typically be applied to their access also. So
instructs httpd to open the file when it is started and to re-use
this file-handle for all subsequent access to this file.</p>
- <div class="example"><p><code>
+ <pre class="prettyprint lang-config">
CacheFile /usr/local/apache2/htdocs/index.html
- </code></p></div>
+ </pre>
+
<p>If you intend to cache a large number of files in this manner, you
must ensure that your operating system's limit for the number of open
start time (using the mmap system call). httpd will use the in-memory
contents for all subsequent accesses to this file.</p>
- <div class="example"><p><code>
+ <pre class="prettyprint lang-config">
MMapFile /usr/local/apache2/htdocs/index.html
- </code></p></div>
+ </pre>
+
<p>As with the
<code class="directive"><a href="./mod/mod_file_cache.html#cachefile">CacheFile</a></code> directive, any
<p><span>Available Languages: </span><a href="./en/caching.html" title="English"> en </a> |
<a href="./fr/caching.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="./tr/caching.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
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