RE: Backup performance issue.

["Norbut, Jim" <Jim.Norbut@xxxxxxxxxxxxxxx>]

Is it absolutely critical that you figure it out:

You probably will waste more time than it would take to just change the
next program to check to see if the device is ready...if not....pause 5
minutes....and check again and so on and so on.

Assuming that scenario is possible in your workplace.


-----Original Message-----
From: rob@dekko.com [mailto:rob@dekko.com]
Sent: Friday, December 06, 2002 4:16 PM
To: midrange-l@midrange.com
Subject: Backup performance issue.

This is a multipart message in MIME format.
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[ Picked text/plain from multipart/alternative ]
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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