Messages in this thread | | | Date | Tue, 23 Nov 2004 14:38:05 +0100 | From | Nico Schottelius <> | Subject | vmstat: zero cs | system debug |
| |
Hello!
Some minutes ago I had the following problem:
- a fileserver with many process in 'D' state - vmstat shows zero context switches - more or less zero access to the system - system load of ~150 (many smbd processes with 'D') - raid looked fine - no errors in dmesg - no mysterious processes - system not hacked (as its in our company lan) - after rebooting it seems to work - the initialization of the Adaptec AHA-2940U/UW/D / AIC-7881U took quite long, but it works
My questions:
- what could I have done to find out the problem? -> I did ps axu, vmstat, cat /proc/mdstat, free, netstat -an - does zero context switches mean there is one process using completly the cpu? if so, why was I able to start vmstat?
- what todo to fix the problem? -> tried killall -9 smbd apache ...
- is there some TFM for reading about "Linux system analyzing"?
Thanks for any answer,
Nico
[unhandled content-type:application/pgp-signature] | |