http://localhost/ticket/2485 <p> CKAN has <a class="assigned ticket" href="http://localhost/ticket/1447" title="defect: disk space leakage (assigned)">memory leaks</a>. They can be contained by limiting the time-to-live of a ckan process. An easy way to achieve this is to limit the number of requests a ckan server process can serve before it gets killed and replaced. </p> <p> One should ... </p> <ul><li>research ways to limit requests-per-process with the different web servers (see below for a start); </li><li>explain these safeguards in the CKAN documentation and encourage users to apply them; </li><li>consider the helper script <strong><a class="ext-link" href="https://github.com/okfn/ckan/blob/master/ckan_deb/usr/bin/ckan-create-instance"><span class="icon">​</span>ckan-create-instance</a></strong> to generate Apache configs with <strong>WSGIDaemonProcess ... maximum-requests=XY</strong> being active instead of <a class="ext-link" href="https://github.com/okfn/ckan/blob/master/ckan_deb/usr/lib/ckan/common.sh#L262"><span class="icon">​</span>commented out</a>. Or at least let it warn the user to use <strong>MaxRequestsPerChild</strong>; </li><li>Investigate current CKAN deployments whether they suffer from mem leaks, and if so contain them. </li></ul><hr /> <p> How to limit requests-per-process </p> <ul><li>Apache: <ul><li>Use <strong>WSGIDaemonProcess</strong> with <strong>maximum-requests=50</strong> or whatever limit is appropriate. We did this sucessfully on <a class="ext-link" href="http://trac.okfn.org/ticket/904"><span class="icon">​</span>datahub.io</a> and the <a class="ext-link" href="http://trac.okfn.org/ticket/1245"><span class="icon">​</span>ckan farm</a> </li><li>(This need to be verified) Without WSGIDaemonProcess, <strong>MaxRequestsPerChild 50</strong> should achieve the same. </li></ul></li><li>nginx/supervisord: to be researched. </li></ul> en-us http://assets.okfn.org/p/ckan/img/ckan_logo_shortname.png http://localhost/ticket/2485 Trac 0.12.3 nils.toedtmann Fri, 01 Jun 2012 11:49:11 GMT http://localhost/ticket/2485#comment:1 http://localhost/ticket/2485#comment:1 <ul> <li><strong>description</strong> modified (<a href="/ticket/2485?action=diff&amp;version=1">diff</a>) </li> </ul> Ticket icmurray Tue, 19 Jun 2012 09:30:49 GMT http://localhost/ticket/2485#comment:2 http://localhost/ticket/2485#comment:2 <ul> <li><strong>milestone</strong> set to <em>ckan-v1.8</em> </li> </ul> Ticket icmurray Mon, 25 Jun 2012 14:53:48 GMT http://localhost/ticket/2485#comment:3 http://localhost/ticket/2485#comment:3 <ul> <li><strong>milestone</strong> changed from <em>ckan-v1.8</em> to <em>ckan-v1.9</em> </li> </ul> Ticket