3.5 may use a little more ram, but: how many sites are you trying to run on 2 gigs? VPS or shared? What’s in the server logs?
I have 4 sites on a VPS. 3 of them receive hardly any traffic and majority of the traffic is generated by only 1 of the sites. According to my Web host, the server log shows “a number of large php processes that are consuming the memory.” and appears to “have a lot of idle HTTP processes”. However, this issue arose only after I made the upgrade.
Sounds like your VPS is “out of the box” unconfigured and hasn’t had the typical adjustments to mysql and apache. Apache needs to be configured – via httpd.conf – to spawn child servers when needed and kill them off when idle. Mysql will eat ram when not caching DB queries. You can’t expect a VPS to run the best way without any administration.
W3TC can try to cache DB queries and add php optcoding, but it can conflict with server configs. And it hasn’t been updated in over a year. Try WP Super Cache; it’s more reliable, faster and easier to set up. WordPress › WP Super Cache « WordPress Plugins
Thanks for your reply. My host have said they would implement any settings you suggest should be changed on the VPS. Should I just ask them to “configure Apache – via httpd.conf – to spawn child servers” as you mentioned above? I’m not really technical in this area so not sure what to tell them to do for my server to work normally. Thanks again.
My host have said they would implement any settings you suggest should be changed on the VPS…
Sounds like your host has no idea what they’re doing 🙂 Seriously, there’s no single solution that I or anyone can offer here; it’s systems administration, and it takes skill and know-how beyond a few general suggestions I can offer here.
Either your VPS is sold as “unmanaged”, which means you handle all system administration; or it’s sold as “managed”, which means your web host knows systems administration and does the configuration – within reason – that you need. Setting up mysql and apache is 98% of the time very reasonable configuration for a host to do.
