Rob,
Yes, we are looking at the index advisors for sure. What we did see with
the new OS is a jump in the number of indices advised because of an EVI
Only Access reason. Now trying to play that balancing act of benefit
versus cost of each of those indices.
Ken
-----Original Message-----
From: Rob Berendt [mailto:rob@xxxxxxxxx]
Sent: Friday, September 22, 2017 2:21 PM
To: Midrange Systems Technical Discussion
Subject: RE: Jobs are slower since upgrade to 7.3
Well, if you keep getting a jump after every IPL then you really want to
look at your index advisors and whatnot, especially if IPL's before this
were rare as hens teeth. What may be happening is that all the
performance stuff cached gets cleared at each IPL.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: Ken Meade <kmeade@xxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 09/22/2017 01:36 PM
Subject: RE: Jobs are slower since upgrade to 7.3
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
"Best practice" egads... it will bite you every time. :)
Actually we are doing the reverse of best practice and looking at run
times now for some of the jobs that we are seeing this slow down with,
using info from both pre and post OS upgrade and seeing, in some cases,
incremental changes over time and then a jump after initial upgrade and
then a second jump after our last IPL.
Ken Meade
-----Original Message-----
From: Rob Berendt [mailto:rob@xxxxxxxxx]
Sent: Thursday, September 21, 2017 3:50 PM
To: Midrange Systems Technical Discussion
Subject: Re: Jobs are slower since upgrade to 7.3
"Best practice" says you're supposed to run and save a little performance
data before the upgrade so you can compare to see exactly where your
performance lies.
I have to admit, I'm pretty lax on that.
See "Gathering performance data for benchmark" at
https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/rzahc/prepareswup
grade.htm
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: Ken Meade <kmeade@xxxxxxxxxxxxxxxxx>
To: <midrange-l@xxxxxxxxxxxx>
Date: 09/21/2017 03:28 PM
Subject: Jobs are slower since upgrade to 7.3
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
We upgraded our OS to 7.3 at the beginning of August and we've seen a
significant slow-down is some of, but not all, of our batch jobs. Just
curious if others ran into this and what, if anything, was found to be the
culprit. We do a lot of journaling, and have been doing so for some time,
but I did come across an old thread on the use of the HA Journal
Performance tool to help speed things up, but still doesn't answer the
question as to why this has occurred after the upgrade.
Thanks,
Ken Meade
Director of Information Technology | kmeade@xxxxxxxxxxxxxxxxx |
603.444.3570 |
1309 Mt. Eustis Road, Littleton, NH 03561
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