[janslu]

I am running a fairly busy forum at http://www.babyboom.pl/forum . We are currently running on two servers - one for web and a separate one for db.

On web server we are running nginx serving static files and proxying to apache2 with mod_php 5.2.3 and apc 3.0.19. On db - mysql 5.0.51.

The extension caused:
- a slight decrease in pageload (but hardly visible) and not consistent (some pageloads were longer some shorter),
- huge decrease in db->web bandwidh usage (from 30mbit avarage to 10mbit), but not that impressive drop in overall queries/sec numbers.
- noticeable increase in web server load (it's probably no more than few percent avarage cpu usage, but that pushed it over the limit in my case.

So far I have decided to turn it off because my web server is on it's last legs because of load (>900 concurrent users). I will resume tests when I install my new machine.

Thanks for your work :-)
It may have great influence in most situations, especially on sites where mysql is a bottleneck. But before you install, you have to consider a slight increase in load with APC...