how to check which processes are in wait cpu cycle

brgsousa · 08-10-2010, 02:18 PM

My mail server is presenting a high wait time (see attachment) that sometimes reaches 80%. How can I check which processes are doing that?

Regards

paulsm4 · 08-10-2010, 02:35 PM

Load average of 192??? Holy crap!

"top" is definitely a good start.

Also "ps -eaf" and "vmstat". And there's tons of value information in "/proc".

SUGGESTION:
Google for "linux performance tuning I/O bound high wait" and see what you come up with.

PS:
Please keep us posted what happens!