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Note that reusable ODPs don't have an effect till the third run of the same statement.

If you saw improvement between the 1st and 2nd runs, then something else is the cause. Perhaps a
temporary index?

If so, a permanent index is probably all you need.

HTH,

Charles Wilt
--
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Charles St-Laurent
Sent: Wednesday, August 13, 2008 4:04 PM
To: midrange-l@xxxxxxxxxxxx
Subject: RE: Subsystems and ODP - answer to Wilt, Charles

Hi!

I looked at the data performance analysis tool that is provided in iSeries
Navigator when I launched the process. The big performance loss was when I
have to open the database files for the first time. So I supposed that if
I
can keep these files open between calls, the entire process would be
shorter
than now. That's why the idea to have a server job with a specific
activation group and many children threads sharing the same activation
group
appeared to me to be the best way to solve our performance loss. Once
opened
in the activation group, the ODPs will stay opened and will be re-used by
subsequent requests.

I tested shared ODP locally on my user by calling the process
interactively
without reclaiming the activation group ressources between calls. The
first
time I launched the process, I got the result after 50 seconds, probably
because it had to open files for the first time. Then, all my subsequent
calls took an average of 5 - 10 seconds for exactly the same request.


Charles St-Laurent
Consultant Berco
Technologies
Industrielle Alliance, Assurance auto et habitation
Téléphone : 418 650-4600, poste 3216
Sans frais : 1 800 463-4382
Télécopieur : 418 650-4612
Sans frais : 1 877 650-4612
Courriel : charles.st-laurent@xxxxxxx <mailto:pcharles.st-laurent@xxxxxxx>
www.inalco.com/assurancegenerale


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