volkanbg

I tried to follow your recommendations:

– Disable the wp cron job and implement a root level cron job. DONE
– Disable database caching. ALREADY DISABLED for a week now
– Check the Apache config. COULDN’T FIND MUCH RELEVANT PARAMETERS, BUT REDUCED TIMEOUT FROM 5 MINS TO 1 MIN.
– run mysqltuner for database recos. DONE AND DEFRAGMENTED SOME TABLES:
[!!] Total fragmented tables: 2
[!!] Maximum possible memory usage: 6.8G (559% of installed RAM)
[!!] Key buffer hit rate: 80.1% (2K cached / 454 reads)
[!!] Temporary tables created on disk: 30% (3 on disk / 10 total)

No change on the periodic overload problem. I will have to do something about available RAM at some point but right now the 15 minute hits still bug me. The only relevant setting I could see is the “Automatically prime the page cache” setting in W3TC, which is set to 900 seconds by default. However that setting is unchecked and has been for a while:

'pgcache.prime.enabled' => false,
'pgcache.prime.interval' => 900,
'pgcache.prime.limit' => 10,
'pgcache.prime.sitemap' => '',
'pgcache.prime.post.enabled' => false,

Thanks Gary for the quick response.

I am aware of the global setting but I also use the boxes for the author’s pages and ‘all authors’ page.

Before posting this question I spent quite some time within wp-biographia.php but was a bit lost most of the time. It’s a well documented piece of code but still too convoluted for me to figure out at a glance. Any pointers would be much appreciated if it’s not too much trouble.