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Rob,

1) Was the performance issue CPU, memory, or disk?
2) Could there be a code issue with SQL monitors?
3) What priority and/or subsystem do these run in?

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Friday, April 24, 2015 8:22 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Performance impact of SQL monitors

Recently got a contact from a coworker. Their SQL was running much slower on an lpar. They keep detailed track of start/stop times of certain jobs going back awhile. Their hypotheses was that someone was running an SQL monitor. Yes, there was someone.
They duplicated the data on another lpar.
Ran SQL without any monitors running on system. Good performance.
Ran it again with an sql monitor running on something unrelated. Poor performance.
Ran SQL again without any monitors running on system. Good performance.
Ran it again with an sql monitor running on something unrelated. Poor performance.
These were all running in batch so it's not like "the first time this job ran a certain process...".


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

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