[OT: LOW RAM] Server running 100%

[hendry]

My server is running Debian 4 with RC2 on it. It did run very well for a whole time, but now the amavis / clamav process is hanging on 100% and email is in the meanwhile not delivered. When looking at the running services i see:

Quote:Tasks: 83 total, 5 running, 78 sleeping, 0 stopped, 0 zombie
Cpu(s): 99.7%us, 0.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 516872k total, 506872k used, 10000k free, 15484k buffers
Swap: 2104504k total, 0k used, 2104504k free, 174200k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2751 amavis 25 0 48812 43m 1284 R 33.2 8.5 2:00.31 clamscan
2142 clamav 25 0 49700 43m 840 R 32.9 8.6 2:57.91 clamd
2750 amavis 25 0 48808 43m 1284 R 32.6 8.5 2:00.63 clamscan
2270 ntop 18 0 104m 35m 2296 S 0.3 7.1 0:02.05 ntop

One of my users told me that he has send an email with attachements for 14 MB. Is there a way to exclude this kind of attachements from scanning?
Any other suggestions why these processes are hanging?