Re: QZDASOINIT prestart job tuning

There's a document in the IBM i Information Center on tuning prestart jobs,
written by one of the IBM work management experts.

http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/index.jsphttp://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/experience/work2abstract.htm
http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/experience_web/tuneprestart.pdf

Dawn May
dmmay@xxxxxxxxxx
IBM Liaison for the Large User Group and COMMON Americas Advisory Council
Consultant with IBM Lab Services
Mobile - 507-251-4376
TL 676-8162, External 720-395-8162
Senior Technical Staff Member
http://ibmsystemsmag.blogs.com/i_can/



From: Evan Harris <auctionitis@xxxxxxxxx>
To: Midrange Systems Technical Discussion
<midrange-l@xxxxxxxxxxxx>,
Date: 04/01/2014 06:29 PM
Subject: Re: QZDASOINIT prestart job tuning
Sent by: midrange-l-bounces@xxxxxxxxxxxx



Hi Chris

I've changed the initial number of jobs in the past, and seen other
customers do this as well, in order to get the preferred number of jobs
activated as part of starting the subsystem. At one customer it was set to
3,000 but I bet there are others out there with significantly higher
settings.

I'd set the number of jobs at around 750-800 maybe even a little higher in
your case (say 850), particularly if you are going to change the maximum
number of uses to 1. In that case you would want a job available for new
connections as they connect rather than having them delayed while a job
starts up.


On Wed, Apr 2, 2014 at 11:20 AM, Chris Bipes
<chris.bipes@xxxxxxxxxxxxxxx>wrote:

Has anyone made changes to the QUSRWRK subsystem for the QZDASOINIT
prestart job?

I am looking at the ramification of changes the maximum number of uses to
1 so they recycle after every connection. Also changing the initial

number

of jobs and threshold. Even the additional number of jobs.

We have what I assume is the default:
Job . . . . . . . . . . . . . . . . . . . . . . : QZDASOINIT
Job description . . . . . . . . . . . . . . . . : *USRPRF
Library . . . . . . . . . . . . . . . . . . . :
Start jobs . . . . . . . . . . . . . . . . . . . : *YES
Initial number of jobs . . . . . . . . . . . . . : 1
Threshold . . . . . . . . . . . . . . . . . . . : 1
Additional number of jobs . . . . . . . . . . . : 2
Maximum number of jobs . . . . . . . . . . . . . : *NOMAX
Maximum number of uses . . . . . . . . . . . . . : 200
Wait for job . . . . . . . . . . . . . . . . . . : *YES

We currently have 747 running with a peak of 806 and 746 in use. Peak
usage is 805. Any suggestions on what I should set the values at?

--
Chris Bipes
Director of Information Services
CrossCheck, Inc.

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Regards
Evan Harris
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