[CentOS] Correlate i/o with a process

[Mag Gam]

Thanks John.

Yes, this is a tricky question, but I face this a lot....Unfortunately, I am
not sure how to check the adapter throughput, and what process is causing
the i/o wait.


On 8/17/07, John R Pierce <pierce at hogranch.com> wrote:
>
> Mag Gam wrote:
> > Hello:
> >
> > I have a server with 2 HBAs, and the users keeps complaining about
> > performance problems. My question is, how can I relate the process
> > with high I/O wait? Also, is it possible to see how much data is being
> > pushed thru by my 2 HBAs?
>
> iostat (part of the sysstat package) will answer your 2nd question.
>
> I dunno how to measure io wait time per process.  maybe IBM's NMON can
> do that, not sure, I haven't used it for a while.
> http://www-941.haw.ibm.com/collaboration/wiki/display/WikiPtype/nmon
>
>
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