Re: Slow JDBC access to AS/400 (over 56k remote connection)

This might be a place where package caching would help.  Assuming you are
executing the same INSERT repeatedly, prepared statements, extended
dynamic, and package caching could all help to reduce the amount of comm
(which seems to be the issue here).  Check the Toolbox JDBC FAQ at
http://www.as400.ibm.com/toolbox/faqjdbc.htm, specifically "How can I
improve my program's performance when using the Toolbox JDBC driver?".
There is a paragraph each about prepared statements and extended dynamic
(with package caching).

David Wall
AS/400 Toolbox for Java


dclowe@pathix.com on 07/10/2000 07:02:46 AM

Please respond to JAVA400-L@midrange.com

To:   JAVA400-L@midrange.com
cc:
Subject:  Slow JDBC access to AS/400 (over 56k remote connection)




I find that JDBC access is very slow when connecting to a remote database
on the AS/400.  Here is my configuration:  Client/Server application was
created using VisualAge for Java 2.0 enterprise edition.  Accessing a DB2
database on a IBM AS/400 (720) using V4R4.  It uses the AS/400 toolkit for
Java JDBC driver.  When the clients are connected to the AS400 using a 56k
frame relay, I am getting approximately 1 JDBC insert per second.  It is a
little faster on a 128k frame relay and it runs fine on the local network
(10 megabit).  The clients are Win9x running the Java application in the
Sun JRE for Win9x.  All the JAR files for the runtime, database access,
and our application reside on the client.   Only the database access is
being done remotely.

Does anyone know of any tips that would help improve performance in this
situation, or any articles talking about Win9x clients accessing AS/400
DB2?  Any help would be appreciated.

Thanks... Dean Clowe


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