Re: Backup performance issue. -- MIDRANGE-L

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I don't seem to have SI05599.  I wonder if that would affect the
inconsistencies in run time?

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




bdietz@3x.com
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12/06/2002 08:15 PM
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        Subject:        Re: Backup performance issue.


Rob you usually seem on top of things when I comes to PTF's.  But have you
seen these??

SI05856 510 OSP - SAV/RST Performance Enhancements
SI05599 520 OSP - SAV/RST Performance Enhancements

DESCRIPTION OF PROBLEM FIXED FOR APAR SE07081 :
-----------------------------------------------
  When saving or restoring a large number of directories,
  performance of SAV and RST quickly
  degrades.

CORRECTION FOR APAR SE07081 :
-----------------------------
  When saving or restoring a large number of directories,
  performance of the SAV and RST commands is enhanced.


-------------------------
 Bryan Dietz
3X Corporation
614-410-9205






rob@dekko.com
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Backup performance issue.






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I have a backup that uses the SAV command to save some Domino IFS files.
It should fit in a four hour window between 8pm and 12 midnight.  It uses
a 3590 tape drive.  Most nights it fits fine.  However on occasion it
takes too long and the next job that needs the tape drive aborts it.

I choose the following problem question:  How do I determine why the
backup takes longer on one night versus others?

I looked at the performance data, (iSeries nav, my connections, my400,
Configuration and service, Collection services, right click on collection,
Performance tools, performance data).
Charts:
Transaction count:  I don't think it ever exceeded 500
Transaction response time:  I don't think it ever exceeded 0.5sec.
Total CPU utilized:  I think it peaked at 10%
Interactive CPU:  I think it peaked at 0.37%
Batch cpu:  I think it peaked at 9%
High disk utilization:  peaked at 19%
Machine pool faults:  two spikes around 35, 2 around 20 and the rest below
that.
User pool faults:  stayed under 100
Exception CPU utilization:  Strange.  One peak at 80.  Two peaks at 70.
The rest all around 0.

I checked out SST tape statistics and noticed no temp read or write
errors.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin
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