We recently upgraded to PHP 5.5 on our Debian server so as to use OPcache. Unfortanetly, we haven't seen much improvement in performance. Here is a screenshot of the OPcache Overview page: http://screencast.com/t/V2MvjlY9F
Notice that Memory Usage is at 100%. I've searched the web but can't figure out this is good or bad.
Can anyone shed some light on this?
Also, does this screenshot reveal any other problems?
I should also mention that we are using a virtual server with 4MB RAM and we are running 2 Moodle sites (version 2.4 and 2.5).
Any feedback would be appreciated.