Do you have logical files/views/indexes/joins over your physical tables keyed with the most sought after sequence? Building an access path each time an SQL statement retrieves data can be costly.
Thanks,
Gary Monnier
IT Software Engineer CSM, CSPO
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Brian Piotrowski
Sent: Friday, July 15, 2016 4:01 AM
To: Midrange Systems Technical Discussion
Subject: RE: Restricting QZDASOINIT jobs
Thanks, Charles.
It's not that I want to see QZDASOINIT jobs at less than x% - it's because they are having a bona fide impact on the system. We've been struggling with this forever - we can optimize the sql statements until the cows come home but it doesn't seem to make a difference - QZDASOINIT jobs consume a significant amount of CPU cycles.
We're actually going to move to a different ODBC driver from a third party to see if that solves the problem. But in the meantime I'll read over the documentation you included and we'll see if it makes sense to implement.
Thanks!
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Charles Wilt
Sent: Thursday, July 14, 2016 4:30 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Restricting QZDASOINIT jobs
At 7.1+ you can assign "workload groups"
https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20i%20Technology%20Updates/page/IBM%20i%20workload%20groups
But only useful if you're running a multiple core machine.
Why do you want to do this?
Assuming your CPU isn't at 100%, all you'd be doing is artificially slowing down the work being done via ODBC. It won't speed up anything else.
Do you actually have a problem? Or do you just not like seeing QZDASOINIT using 50%?
If you actually have a problem, you can adjust run priority, memory available, max active, ect ect to provide more resources for non-ODBC work.
Charles
On Thu, Jul 14, 2016 at 3:59 PM, Brian Piotrowski < bpiotrowski@xxxxxxxxxxxxxxx> wrote:
Hi all,
A while ago I moved all of my ODBC spawned jobs into their own
subsystem (which I conveniently named "ODBC"). Is there a way I can
restrict how many resources they consume? Whenever I look at my
system status the QZDASOINIT jobs seem to hog a lot of resources (in
excess of 50% CPU utilization). I'd like to restrict them to using a
cumulative percentage of less than 25%, but not sure if it can be done.
Thankee-sai!
/b;
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