5

Hi there I am pretty newbie in servers, would appreciate your help. How do I set up an iostat logging? as my Disk IO spikes strange at some random time to very high levels. Thanks.

Improve this question

1 Answer 1

Reset to default
6

IOSTAT provides stats for individual block devices, and won't tell you which process is actually driving IO. However, it's useful for characterizing your I/O access patterns. You can generate a large log-file with this command:

iostat -x sda -c 2 -t > stats.log

This will monitor sda (-x sda) every 2 seconds (-c 2) with a timestamp (-t). The logfile is not pretty, but it'll get you there.

Improve this answer
2
  • "...which process is actually driving..." is there one which can tell me and I can log the history to find out? for seeing the pattern of io spikes I can see it in linode dashboard. But really need to find out the issue and eliminate it. thanks.
    – simple
    Jan 26, 2011 at 21:34
  • @Simple For that, read this question: serverfault.com/questions/25032/…
    – sysadmin1138 ♦
    Jan 26, 2011 at 21:41

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .