Comments on: WordPress permalinks and MySQL limits http://coreygilmore.com/blog/2008/04/10/wordpress-permalinks-and-mysql-limits/ Fri, 30 Jul 2010 06:22:31 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Sam http://coreygilmore.com/blog/2008/04/10/wordpress-permalinks-and-mysql-limits/comment-page-1/#comment-52605 Sam Fri, 16 Jul 2010 19:20:42 +0000 http://coreygilmore.com/?p=228#comment-52605 Hi I have run into this max_allowed_packet bottleneck on WP 3.0 recently My rewrite rules are currently 1.6MB It seems that it is not pages that are the culprit, but image attachment pages that are generating so many rewrite rules. I only have about 200 pages on the site. But looking at the rewrite rules am seeing a lot of rules like: s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";s:77:"(world-cup-2010-galleries/world-cup-review/argentina-11-2)(/[0-9]+)?/?$"; which are from image attachments. It seems like rewrite_rules are still a bottleneck in wordpress scalability.... Increasing the max_allowed_packet is only a temporary fix, as if your rewrite_rules get to be too large your server will be in danger of running out of memory every time the rewrite_rules are flushed and refreshed... Hi
I have run into this max_allowed_packet bottleneck on WP 3.0 recently

My rewrite rules are currently 1.6MB

It seems that it is not pages that are the culprit, but image attachment pages that are generating so many rewrite rules.

I only have about 200 pages on the site. But looking at the rewrite rules am seeing a lot of rules like:

s:50:"index.php?attachment=$matches[1]&cpage=$matches[2]";s:77:"(world-cup-2010-galleries/world-cup-review/argentina-11-2)(/[0-9]+)?/?$";

which are from image attachments.

It seems like rewrite_rules are still a bottleneck in wordpress scalability….

Increasing the max_allowed_packet is only a temporary fix, as if your rewrite_rules get to be too large your server will be in danger of running out of memory every time the rewrite_rules are flushed and refreshed…

]]> By: Corey http://coreygilmore.com/blog/2008/04/10/wordpress-permalinks-and-mysql-limits/comment-page-1/#comment-3040 Corey Sun, 13 Apr 2008 18:25:43 +0000 http://coreygilmore.com/?p=228#comment-3040 Ah that's great news Matt! I'd been following <a href="http://trac.wordpress.org/ticket/3614" rel="nofollow">bug 3614</a> and noticed it had been fixed in 2.5. On 2.3.3 I'm replacing the WP_Rewrite class during init with a slightly modified version that doesn't write any feed or trackback entries resulting in about a 70% performance increase. I haven't begun to test the site with 2.5 yet, but I'll make sure to file a bug report if I'm still seeing the issue. Ah that's great news Matt! I'd been following bug 3614 and noticed it had been fixed in 2.5. On 2.3.3 I'm replacing the WP_Rewrite class during init with a slightly modified version that doesn't write any feed or trackback entries resulting in about a 70% performance increase. I haven't begun to test the site with 2.5 yet, but I'll make sure to file a bug report if I'm still seeing the issue.

]]> By: Matt http://coreygilmore.com/blog/2008/04/10/wordpress-permalinks-and-mysql-limits/comment-page-1/#comment-3039 Matt Sun, 13 Apr 2008 18:15:41 +0000 http://coreygilmore.com/?p=228#comment-3039 I'm pretty sure this isn't an issue anymore in 2.5, rewrite rules have been minimized. I'm pretty sure this isn't an issue anymore in 2.5, rewrite rules have been minimized.

]]>