Re: Finding greedy kernel process

From: Green, Simon (Simon.Green_at_EU.ALTRIA.COM)
Date: 06/03/04

  • Next message: Bill Verzal: "Re: OT - project management software" 
    Date:         Thu, 3 Jun 2004 17:46:00 +0200
To: aix-l@Princeton.EDU

    The "wait" process is just what runs when there's no work to do,
    i.e. when the system is idle. This is normal.

    If you've actually got a performance problem you need to look
    elsewhere.

    I usually start with vmstat, to get an idea of what's going on,
    in particular whether there's any paging, and the run-queue size.

    Tools such as topas (comes with AIX) and nmon are good for
    finding out what processes are actually chewing up CPU. 

    --
Simon Green
Altria ITSC Europe Ltd
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> -----Original Message-----
> From: Lieberg, Patrick [mailto:plieberg@EV3.NET]
> Sent: 03 June 2004 16:12
> To: aix-l@Princeton.EDU
> Subject: Finding greedy kernel process
>
>
> Starting yesterday around 4pm, the kernel on my 4.3.3 system
> has been eating a significant chunk of processor time.  I've
> looked into this pretty thoroughly and can't seem to find the
> culprit.  There's been no change from what the disk activity
> normally is during this time.
>
> ps gv lists the two largest hogs as PID 516 and 774, which
> are I belive the idle and wait kproc PIDs.  Using pprof shows
> essentially the same output.
>
> Anyone have any suggestions on how to proceed?
  • Next message: Bill Verzal: "Re: OT - project management software"

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