I have 5 wordpress installations on a VPS, doing approximately 200,000 pageviews weekly. I love what the W3 Total cache + APC does, but I find it problematic that when posting to any of the blogs, all "user cache entries" from APC gets cleared out. This essentially means that all queries have to be done again. And it seems to be an expensive process, as my server is out of memory all to often when it happens.
Is this something I can tune from the settings, as not to happen, or is this a "feature" of w3 total cache?
Love the plugin, just need to find the right settings :) Thanks in advance!