iowait 2006-01-11 - By Arjan van de Ven
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On Wed, 2006-01-11 at 14:34 -0500, Hoover Mark A AISC CONT wrote:
> I've got an annoying little problem that I'm trying to find the answer to.
>
> I have something that about every 2-3 days I have something that runs I/O
> wait up to anywhere between 4-10%. Normally ours is 0-1%. This isn't
> bringing the server to its knees, but I'd really like to find out what
> process is doing it.
>
> If anybody can tell me how to match a given process to the iowait, I'd
> really appreciate it. I've been looking at the output of iostat, vmstat,
> lsof, ps, and top all morning and don't feel any closer than when I started.
look for "D" state processes in ps / top.
note that iowait is idle time (even when it's not accounted in the idle
percentage), the cpu is doing nothing, just something is waiting for
disk.
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