I’m running out of ideas on how to fix this problem. I’ve had a VPS for awhile now, over a year at least, and am running Wordpress 3.5 and a Vbulletin forum with it. Few plugins overall, WP Supercache for the WP site.
It seems like every couple of weeks, or every week in some instances, the server load spikes for a day or two (or three), with it averaging in the 20’s but spending time in the 70’s.
I had it set at 2500 for memory and 2000 for mysql. I’ve been told I needed more ram (though the server status page rarely showed it going above 2000), so I set it to 3500 just to see if it would make an impact.
I’m having no luck at all. I’m not a hugely busy site but I get good traffic. I can’t figure out what would be causing it to spike to these high numbers.