Re: AS/400 JDBC Insert performance

[Dieter.Bender@xxxxxxxxxxx (Dieter Bender)]

Allen,

the easiest way to speed up such bulk inserts is to do it multithreaded with 
multiple connections. this way the database workload is splitted to multiple 
jobs, one for each connection.
8 hours for 180.000 rows = 166 Milliseconds per simple transaction is very 
slow. I would have a look to the database monitor, what the job is doing all 
the time. The summary by operations shows up the average for each sql 
operation. normally an insert should be in the range of  < 2 milliseconds .

Is the table loaded from zero records?
does the job start fast and is getting slower?

Dieter

On Wednesday 09 July 2003 04:59, you wrote:
> I need to insert 180,000 rows into an AS/400 table
> within a 4 hour period.  Currently the best I can do
> will come in at 8 hours.  I am pretty sure that I
> should be able to at least double this speed.
>
> I am using the JT/Open toolkit JDBC driver.  I'm using
> Prepared Statements and I'm commiting after each batch
> of 250 rows.  The odd thing is that batching up the
> commits at 250 rows doesn't appear to be any faster
> than single row commits.
>
> Is there anything I need to do on the AS/400 to
> improve performance?  Will changing the isolation
> level of my JDBC connection make any difference?
>
> Thanks,
> Allen.
>
> =====
>
>
> __________________________________
> Do you Yahoo!?
> SBC Yahoo! DSL - Now only $29.95 per month!
> http://sbc.yahoo.com
> _______________________________________________
> This is the Java Programming on and around the iSeries / AS400 (JAVA400-L)
> mailing list To post a message email: JAVA400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/java400-l
> or email: JAVA400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/java400-l.

-- 
mfG

Dieter Bender


DV-Beratung Dieter Bender
Wetzlarerstr. 25
35435 Wettenberg
Tel. +49 641 9805855
Fax +49 641 9805856
www.bender-dv.de