Re: 10046, Unaccounted for Time, Aix 5.3 -- How to Determine Process Pre-Emption

From: Carol Dacko <dackoc@xxxxxxxxx>
To: elkinsl@xxxxxxxxx
Date: Wed, 2 Dec 2009 15:19:58 -0500

Larry,
Have your SA's tried using the free tool NMON?  We have used that tool plus
the output of the 10046 level trace to determine what is happening.  I'd be
curious to know if they have tried that!

Good Luck!
Carol Dacko
University of Michigan

On Wed, Dec 2, 2009 at 3:13 PM, Larry G. Elkins <elkinsl@xxxxxxxxx> wrote:

> Listers,
>
> SA's asking for assistance on how to tell if a process is being impacted
> and
> to what degree by processor pre-emption. AIX 5.3. Asked in the context of
> trouble-shooting some significant unaccounted for time issues in 10046
> trace
> files (e.g. 14 of 16 seconds unaccounted for vendor process, 300 of 700
> seconds unaccounted for vendor batch job, etc). SA's have "ruled out"
> overhead of writing the trace file so now looking at the pre-emption
> aspect.
> A bit out of my league, and I find plenty of approaches in IBM docs, and
> from people on this list (but geared more towards Solaris and other
> flavors,
> not Aix). 9.2.0.8 EE and 10.2.0.4 EE, "static" and dynamic LPAR's, seen on
> various boxes and databases.
>
> Larry G. Elkins
>
>
> --
> //www.freelists.org/webpage/oracle-l
>
>
>

References:
- 10046, Unaccounted for Time, Aix 5.3 -- How to Determine Process Pre-Emption
  - From: Larry G. Elkins

Re: 10046, Unaccounted for Time, Aix 5.3 -- How to Determine Process Pre-Emption

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