[MrLister]

Defiently upgrade the ram. Swap will crash your server and cause higher server loads fasters then anything else. (1GB should do it but it's using 100% of your swap meaning you don't really know how much you need. you can type in "free -m" and see how much memory is in cache because what's swapped could easily just be the stuff that's not used that's waiting to expire)

Also install http://www.vbulletin.com/forum/showthread.php?t=165367 . The memory would probably run you a extra $25 / month, APC above will cost you nothing except 3 minutes of your time and the difference should be day and night.

Originally Posted by Alex_

mysql is optimized using a collection of tipps from several vB forums (com org etc ) - the standard setup without caching did a good job before 3.5 so I was simply too lazy to do this earlier...

We do not have any acceleration addons yet however I want to take a look at the template cache plugin when it's ready to store them in the memory and not on the hdd.

Perhaps I should also take a loop at php caching or precompiled php...

Since we have only one gig of ram and the mrtg shows that it's always full while the system is swapping things out - should we first upgrade ram?