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Code Editor : performance.html
<!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>Varnish and Website Performance — Varnish version 5.2.1 documentation</title> <link rel="stylesheet" href="../_static/classic.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '5.2.1', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="top" title="Varnish version 5.2.1 documentation" href="../index.html" /> <link rel="up" title="The Varnish Users Guide" href="index.html" /> <link rel="next" title="Achieving a high hitrate" href="increasing-your-hitrate.html" /> <link rel="prev" title="Statistics" href="operation-statistics.html" /> </head> <body role="document"> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="increasing-your-hitrate.html" title="Achieving a high hitrate" accesskey="N">next</a> |</li> <li class="right" > <a href="operation-statistics.html" title="Statistics" accesskey="P">previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" accesskey="U">The Varnish Users Guide</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="varnish-and-website-performance"> <span id="users-performance"></span><h1>Varnish and Website Performance<a class="headerlink" href="#varnish-and-website-performance" title="Permalink to this headline">ΒΆ</a></h1> <p>This section focuses on how to tune the performance of your Varnish server, and how to tune the performance of your website using Varnish.</p> <p>The section is split in three subsections. The first subsection deals with the various tools and functions of Varnish that you should be aware of. The next subsection focuses on the how to purge content out of your cache. Purging of content is essential in a performance context because it allows you to extend the <em>time-to-live</em> (TTL) of your cached objects. Having a long TTL allows Varnish to keep the content in cache longer, meaning Varnish will make fewer requests to your relatively slower backend.</p> <p>The final subsection deals with compression of web content. Varnish can gzip content when fetching it from the backend and then deliver it compressed. This will reduce the time it takes to download the content thereby increasing the performance of your website.</p> <div class="toctree-wrapper compound"> <ul> <li class="toctree-l1"><a class="reference internal" href="increasing-your-hitrate.html">Achieving a high hitrate</a><ul> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#tool-varnishtop">Tool: varnishtop</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#tool-varnishlog">Tool: varnishlog</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#tool-lwp-request">Tool: lwp-request</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#tool-live-http-headers">Tool: Live HTTP Headers</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="increasing-your-hitrate.html#the-role-of-http-headers">The role of HTTP Headers</a><ul> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#cookies">Cookies</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#cache-control">Cache-Control</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#age">Age</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#pragma">Pragma</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#authorization">Authorization</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#overriding-the-time-to-live-ttl">Overriding the time-to-live (TTL)</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#forcing-caching-for-certain-requests-and-certain-responses">Forcing caching for certain requests and certain responses</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#normalizing-your-namespace">Normalizing your namespace</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="increasing-your-hitrate.html#http-vary">HTTP Vary</a><ul> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#vary-parse-errors">Vary parse errors</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#pitfall-vary-user-agent">Pitfall - Vary: User-Agent</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="increasing-your-hitrate.html#cache-misses">Cache misses</a></li> <li class="toctree-l1"><a class="reference internal" href="increasing-your-hitrate.html#uncacheable-content">Uncacheable content</a><ul> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#passing-client-requests">Passing client requests</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#hit-for-miss">hit-for-miss</a></li> <li class="toctree-l2"><a class="reference internal" href="increasing-your-hitrate.html#hit-for-pass">hit-for-pass</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="purging.html">Purging and banning</a><ul> <li class="toctree-l2"><a class="reference internal" href="purging.html#http-purging">HTTP Purging</a></li> <li class="toctree-l2"><a class="reference internal" href="purging.html#bans">Bans</a></li> <li class="toctree-l2"><a class="reference internal" href="purging.html#forcing-a-cache-miss">Forcing a cache miss</a></li> </ul> </li> <li class="toctree-l1"><a class="reference internal" href="compression.html">Compression</a><ul> <li class="toctree-l2"><a class="reference internal" href="compression.html#default-behaviour">Default behaviour</a></li> <li class="toctree-l2"><a class="reference internal" href="compression.html#compressing-content-if-backends-don-t">Compressing content if backends don't</a></li> <li class="toctree-l2"><a class="reference internal" href="compression.html#uncompressing-content-before-entering-the-cache">Uncompressing content before entering the cache</a></li> <li class="toctree-l2"><a class="reference internal" href="compression.html#gzip-and-esi">GZIP and ESI</a></li> <li class="toctree-l2"><a class="reference internal" href="compression.html#turning-off-gzip-support">Turning off gzip support</a></li> <li class="toctree-l2"><a class="reference internal" href="compression.html#a-random-outburst">A random outburst</a></li> </ul> </li> </ul> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="operation-statistics.html" title="previous chapter">Statistics</a></p> <h4>Next topic</h4> <p class="topless"><a href="increasing-your-hitrate.html" title="next chapter">Achieving a high hitrate</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/users-guide/performance.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="increasing-your-hitrate.html" title="Achieving a high hitrate" >next</a> |</li> <li class="right" > <a href="operation-statistics.html" title="Statistics" >previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" >The Varnish Users Guide</a> »</li> </ul> </div> <div class="footer" role="contentinfo"> © Copyright 2010-2014, Varnish Software AS. 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