RE: Backup performance issue. -- MIDRANGE-L

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That scenario is not possible.  Each set of libraries belongs to a legally
separated company.  And, granted the backup after the Domino backup runs
for hours, however the longest that any one particular company is down is
a few minutes.  And there in an intranet site which lists the minutes your
division was locked out the previous night.  The users count on
consistency.  And, other job schedule entries do also.

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




"Norbut, Jim" <Jim.Norbut@Grubb-Ellis.com>
Sent by: midrange-l-admin@midrange.com
12/06/2002 05:27 PM
Please respond to midrange-l

        To:     <midrange-l@midrange.com>
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        Subject:        RE: Backup performance issue.


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.

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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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