RE: Varying back up times

Along with the increased utilization rates, I'd imagine your disk
response times are also elevated on the slow days. Hence, the elongated
duration of the save.

It sounds as though you have one or more jobs running concurrently with
the save that are imposing contention at the i/o level. You may want to
run some queries over your Collection Services data to get a feel for
which of these are i/o-intense. The file QMPGDATA/QAPMJOBL is a good
place to start.

Steve
--


------------------------------

date: Tue, 22 Dec 2009 09:24:46 -0500
from: rob@xxxxxxxxx
subject: Re: Varying back up times

On the slow day disk arm utilization averaged about 30% On the fast day
it averaged about 18%


Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Charles Wilt <charles.wilt@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 12/22/2009 08:24 AM
Subject: Re: Varying back up times
Sent by: midrange-l-bounces@xxxxxxxxxxxx



Rob,

Take a look at your disk busy% for the two days.

Charles

On Mon, Dec 21, 2009 at 1:34 PM, <rob@xxxxxxxxx> wrote:

We have a backup process that runs anywhere from 6.2 to 8 hours.

Which

day of the week is shorter than the others, varies. Nothing really

sticks

out in the joblog. Most runs it's a 1,000 page joblog. Time shots at
various pages:

FastDay SlowDay
P1 19:30 19:30
P100 21:02 21:03
P200 21:23 21:32
P300 21:49 22:14
P400 22:08 22:37
P500 22:54 23:40
P600 23:37 0:58
P700 0:09 1:42
P800 0:32 2:08
P900 1:25 3:05
P1000 1:48 3:27

CPU Utilization never hit 10% on fast night. On the slow night it
averaged between 10 & 20% with only 1 spike that hit 42% and only two
spikes that hit 30%

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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