Re: SQL Performance in V5R2

[pnelson@xxxxxxxxxx]

Caution Will Robinson!

There is a problem with the query manager being introduced by the level 8 
database PTF's. A client has been having weird problems ever since his 810 
with that code was installed in early July.

IBM is not sure why it's happening, but they think they might be close to 
finding a fix. A formal PTF will be another 2-3 weeks. They put a patch on 
the system to avoid the situation, but it  slows the machine down. 
Sometimes this problem manifests itself to the point where the job cannot 
be cancelled, and he must reboot the machine.

Recommendation: Wait for the next round of PTF's before upgrading.


Paul Nelson
Arbor Solutions, Inc.
708-670-6978  Cell
pnelson@xxxxxxxxxx




rob@xxxxxxxxx
Sent by: midrange-l-bounces@xxxxxxxxxxxx
08/18/2003 01:52 PM
Please respond to Midrange Systems Technical Discussion

 
        To:     Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
        cc: 
        Subject:        Re: SQL Performance in V5R2


Without a doubt ensure that you order the latest cume, hiper group and 
database group.  If you've had the V5R2 cd's laying around for longer than 

4 or 5 months, then throw away the cume CD's that came with it and order a 

new set.

For more information on group ptf's
http://as400service.rochester.ibm.com/supporthome.nsf/Document/10000031

Rob Berendt
-- 
"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." 
Benjamin Franklin 





"Bill Freiberg" <bfreiberg@xxxxxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
08/18/2003 01:17 PM
Please respond to Midrange Systems Technical Discussion
 
        To:     midrange-l@xxxxxxxxxxxx
        cc: 
        Fax to: 
        Subject:        SQL Performance in V5R2


One of the things listed in "What's new in V5R2" is a rewrite of the query
optimizer to improve SQL / query performance. We are upgrading soon, but
being asked now about things we can do to aid in CPU usage and user
experience. For those of you that have already gone to V5R2, has there 
been
a noticeable performance improvement? Our apps are VERY SQL intensive to
accommodate completely dynamic sorting and filtering, and while our system
performance is good (box and index tuning done and reviewed regularly) we
are always prodded by our hardware guys to see if we can't get a few more
RPMs out of the hamster wheel.

Any shared experience would certainly be appreciated.

_______________________________________________
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing 
list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.


_______________________________________________
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing 
list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.