RE: Need better WebSphere Application Server Performance for anapplication thereunder

Forgive me if this is a repeat but I sent this yesterday afternoon and
it doesn't appear to have made it to the list.

John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787 F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: 
Sent: Tuesday, November 14, 2006 3:46 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Need better WebSphere Application Server Performance for
anapplication thereunder

Our biggest WAS performance gains came when we moved WAS to a private
memory pool.  If you're only doing one WAS instance, change the SBS to
use a separate memory pool.  Allow the performance adjuster to move RAM
into the pool as needed.  Watch for peaks and set the pool to have
around that much as a minimum.

We've had a single WAS instance take 13+GB RAM.

If you let WAS run out of *BASE, it will be lumped in with the RAM
paging that occurs for all of the stuff in *BASE.  On most systems
that's almost everything except 5250 users and printers.  Java does it's
own memory management (sort of, anyway) and will perform far better if
segregated from other RAM consumers.

There's also the Dump Java (IIRC) command that dumps details about the
JVM.  That may prove useful.


John A. Jones, CISSP
Americas Information Security Officer
Jones Lang LaSalle, Inc.
V: +1-630-455-2787 F: +1-312-601-1782
john.jones@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Dave Odom
Sent: Tuesday, November 14, 2006 12:31 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Need better WebSphere Application Server Performance for
anapplication thereunder

Gang,
 
How can I increase the performance of WAS so an application running
thereunder will perform as good or better than its Windoz counterpart?  
 
 
We have installed WAS and the package application that we'd like to run
under both on a Wintel blade that runs under one of our partitions  and
we also installed it in the IFS of one of our i5 partitions; this to see
which would perform better.  We also installed a version of the package
application under regular Windoz without any WebSphere.   Well, the
WebSphere versions of the application, regardless of where installed,
runs like a herd of turtles in a cloud of wet cement, I assume because
of all that Java, whereas the Windoz version simply flys; because,
basically, its a Client-Server type of application.   I'd really like to
get one of the WebSphere versions of the application running at an
acceptable performance level.   
 
Anyone experienced something like this before and if so, how do you make
performance acceptable.
 
Thanks in advance,
 
Dave Odom
Arizona
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