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  1.  Home
  2. WEB400
  3. April 2006

Re: Slow Query Performance from the Web

Long Live Green Screen

-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On
Behalf Of Walden H. Leverich
Sent: Wednesday, April 19, 2006 7:36 AM
To: Web Enabling the AS400 / iSeries
Subject: Re: [WEB400] Slow Query Performance from the Web

Can you post the SQL and the number of rows returned in the result set?
Also, have you run SQL Performance Monitors on the job?

One mistake I've seen lots of people make in Java is not to pre-size a
collection when loading records into a collection. In one case simply
adding an ensurecapacity(500) method call to an ArrayList changed
response time from 20 seconds to sub-second.

The more memory constrained the app server the more a problem like this
will be noticed.

-Walden

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