I'm running a moderately active site (2,000 page view per day) on a VPS with 1GB RAM.
Got my hosting provider to install APC for me, I installed W3 Total Cache, configured it - using all caching options except object cache and CDN.
On the front-end side of things...it's going well. Site is much snappier.
On the back-end, problems...but I don't know if it's W3 related or something else.
When we (2 of us) post/publish from the administrative interface, it seems to spawn a significant number of processes...which then spikes the CPU and memory use.
I'm pretty new to WordPress (convert from Joomla), so I'm having a really difficult time tracking this one down. The hosting providers techs are scratching their heads as well.
I know that W3 Total Cache doesn't cache anything for logged in users, so I'm a bit mystified here.
My questions would be...
1. Are there ways of troubleshooting a plugin issue other than 'process of elimination'?
2. Is there an outside chance it's APC/W3 related?
I apologize if I'm a bit off-topic here, but it seems like smart folks use this forum...and I'm feeling pretty dumb at the moment.
Any suggestions are appreciated.