Plesk 8.4 needs restarting otherwise it crashes

[crispy78]

Our Plesk installation (Plesk 8.4 on Linux OpenSuse 10.2) needs frequent reboots otherwise it crashes.
Memory usage is often up to 90% and the load average then is 3.06 of 4.02.
After restart the server's memory usage is 8,5% and the load average is about 0.25.
Could someone give me some hints on how to fix this problem or to find out what causes the problem?

 

[ziba@]

Hi,

What processes use most cpu and memory according to top output when this happens?
You can also try to find reason by checking system logs (/var/log/messages) and Plesk error log (/usr/local/psa/admin/logs/httpsd_error_log)

How many processors and how much memory do you have on this server? How many domains does it host?

 

[crispy78]

I've checked the logs but can't find an error because there isn't one, the system simply "hangs".
We host about 5 domains, with about 110 GB of datatraffic every month on generating about 15 GB every sunday.