Comments on: More on WPMU Performance http://itmoves.wordpress.com/2008/10/26/more-on-wpmu-performance/ Adventures In Teaching and Technology Wed, 16 Dec 2009 06:17:32 +0000 http://wordpress.com/ hourly 1 By: Ben Chun http://itmoves.wordpress.com/2008/10/26/more-on-wpmu-performance/#comment-488 Ben Chun Sun, 09 Nov 2008 18:16:21 +0000 http://itmoves.wordpress.com/?p=243#comment-488 The thing that actually fixed our performance problems was setting a MaxRequestsPerChild in Apache's mpm.conf -- which is really just a hack that restarts each child process after serving a certain number of requests. We have it set at 1000 right now, and it solved our problems. This means that somewhere WordPress is either leaking memory or hanging or holding a database connection open or... I don't know. It doesn't make much sense. I suppose PHP or MySQL could also be at fault, but we didn't see these problems until after upgrading from WPMU 1.3 to 2.6 so that's at least part of the issue. It could just be that there's code now that exercises parts of PHP or MySQL that were not previously used, and they are leaking or otherwise at fault. The thing that actually fixed our performance problems was setting a MaxRequestsPerChild in Apache’s mpm.conf — which is really just a hack that restarts each child process after serving a certain number of requests. We have it set at 1000 right now, and it solved our problems.

This means that somewhere WordPress is either leaking memory or hanging or holding a database connection open or… I don’t know. It doesn’t make much sense. I suppose PHP or MySQL could also be at fault, but we didn’t see these problems until after upgrading from WPMU 1.3 to 2.6 so that’s at least part of the issue. It could just be that there’s code now that exercises parts of PHP or MySQL that were not previously used, and they are leaking or otherwise at fault.

]]> By: Elad Salomons http://itmoves.wordpress.com/2008/10/26/more-on-wpmu-performance/#comment-458 Elad Salomons Sun, 26 Oct 2008 21:24:13 +0000 http://itmoves.wordpress.com/?p=243#comment-458 Hi, Thank you for updating <a href="http://www.ringofblogs.com/2008/01/17/using-wp-super-cache-plugin-with-wordpress-mu" rel="nofollow">my solution</a> for the cache issue. As for S3, check out my plugin for <a href="http://www.ringofblogs.com/2008/04/12/off-loading-wpmu-theme-files-to-amazon-s3/" rel="nofollow">offloading theme files to Amazon S3</a>. Hi,
Thank you for updating my solution for the cache issue.
As for S3, check out my plugin for offloading theme files to Amazon S3.

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