Re: Performance between JT400 and Client Acces ODBC

I posed your question to one of our performance guys and got this back:

I don't understand why Create and Drop Table are both faster, but I would
expect the others to be faster by default (no tuning).   The main reason is
that ODBC uses package support (aka extended dynamic by default and the
Java toolbox driver requires extra configuration to make use of that
function.  When I was testing ODBC I would normally see a 50% to 2X
improvement in throughput with package support.


Regards,

Richard D. Dettinger
AS/400 Java Data Access Team

"TRUE! nervous, very, very dreadfully nervous I had been and am; but why
WILL you say that I am mad?
The disease had sharpened my senses, not destroyed, not dulled them. "

- Edgar Allan Poe
"The Tell-Tale Heart"




"Franco Biaggi" <fbiaggi@ticino.com>@midrange.com on 11/28/2000 04:05:40 AM

Please respond to JAVA400-L@midrange.com

Sent by:  owner-java400-l@midrange.com


To:   "JAVA400-L@midrange.com" <JAVA400-L@midrange.com>
cc:
Subject:  Performance between JT400 and Client Acces ODBC



Hello,
we are made some performance test from a client to the AS/400.
1.st using the JT400 JDBC driver.
2.nd using SUN JDBCODBC driver over ClientAcces ODBC

There are very big differences:
(Times in milliseconds)

ODBC    JT400

Create table:         1302   1562
Insert 1000 rows:        15643     29142
Read 1000 rows:        24185     33919
Update 1000 rows:        16664     27679
Delete 1000 rows:        16563     27260
Drop table:              771       861
------------------------------------
Total:            75158    120243
------------------------------------

The SUN driver combined with CA ODBC produce very better performance.

Any comment aprreciated.
Thanks.




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