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New: howto/0-performance.tuning.md, 3 tips added.
2015-07-07 08:09:17 -05:00
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Performance tuning</title>
<link href="./css/markdown.css" rel="stylesheet"></head>
</head>
<body>
<div id="navigation">
<a href="http://www.iredmail.org" target="_blank">iRedMail web site</a>
// <a href="./index.html">Document Index</a>
</div><h1 id="performance-tuning">Performance tuning</h1>
<div class="toc">
<ul>
<li><a href="#performance-tuning">Performance tuning</a><ul>
<li><a href="#setup-a-dns-server-in-lan-or-localhost-to-cache-dns-queries">Setup a DNS server in LAN or localhost to cache DNS queries</a></li>
<li><a href="#enable-postscreen-service-to-help-reduce-spam">Enable postscreen service to help reduce spam</a></li>
<li><a href="#update-amavisd-postfix-config-files-to-process-more-emails-concurrently">Update Amavisd + Postfix config files to process more emails concurrently</a></li>
</ul>
</li>
</ul>
</div>
<p>If you're running a busy mail server (many inbound/outbound emails every day),
you can follow below suggestions for better performance.</p>
<h3 id="setup-a-dns-server-in-lan-or-localhost-to-cache-dns-queries">Setup a DNS server in LAN or localhost to cache DNS queries</h3>
<p>Mail services heavily rely on DNS service and perform many many DNS queries,
Explain why a local cache dns server helps a lot.
2015-07-07 08:25:51 -05:00
a cache DNS server in LAN or localhost helps a lot:</p>
<ul>
<li>It speeds up DNS queries. This helps a lot.</li>
<li>It reduces DNS queries to DNSBL servers, so that you can continue using their
excellent service without exceeding the max query limit.</li>
</ul>
New: howto/0-performance.tuning.md, 3 tips added.
2015-07-07 08:09:17 -05:00
<h3 id="enable-postscreen-service-to-help-reduce-spam">Enable postscreen service to help reduce spam</h3>
<ul>
<li><a href="./enable.postscreen.html">Enable postscreen service</a></li>
</ul>
<p>If you don't want to use postscreen service, you can <a href="./enable.dnsbl.html">enable DNSBL service</a>
instead, it helps a lot too, but less effective than postscreen service.</p>
<p>postscreen and DNSBL service help catch a lot spam, save much system resource.</p>
<h3 id="update-amavisd-postfix-config-files-to-process-more-emails-concurrently">Update Amavisd + Postfix config files to process more emails concurrently</h3>
<ul>
<li><a href="./concurrent.processing.html">Process more emails concurrently</a></li>
</ul><p style="text-align: center; color: grey;">Document published under a <a href="http://creativecommons.org/licenses/by-nd/3.0/us/" target="_blank">CC BY-ND 3.0</a> license. If you found something wrong, please do <a href="http://www.iredmail.org/contact.html">contact us</a> to fix it.<script>
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