Since the last (required) upgrades, our server is running very very very low on memory, and considering how much it swaps to disk, I'd say the disk is close to transparent now.
I had to decrease the amount of spawned webserver processes, - which means some connections are dropped at times. This is obviously not good.
More memory has been underway for quite some time, but it has been a real struggle to locate the *right* memory. I tried some I had in my drawer some months ago, - to which the server just beeped "moron!" in morse-code to me. :-)
Later I tried a 1G module, with the same result.
Yesterday I tried a separately purchased module, ... which it didn't like either. Found a single module with the same amount of RAM as the two we've been running on until now, and THIS worked ... albeit NOT if I tried to combine them, which would otherwise have doubled the memory.
Tomorrow I have a plan to try out two other modules, - but even if I'll keep my fingers crossed, my experience tells me to not promise anything, except you can expect some minor downtime tomorrow morning.
However, when we finally succeed in enlarging the servers memory, I am quite confident everyone will get a much better response, - we've never had CPU related slowness, only memory/swapping.
/DJet