Bad Performance with jdk1.42 and jboss 3.2

[_scottwilliams_]

Maybe its my app, maybe its the database driver but it appears that running my app using jdk1.306 is more than twice as fast as when I use jdk1.42.

I am using jboss 3.2.

I work in aviation biz, so the app I work with does a lot of processing when routing aircraft, so I am pretty sensitive towards performance issues.

I was expected the app to run faster with the new jdk, not slower?

Anyone have any ideas on this?
If anyone has any feedback on this I would appreciate it.

Thanks.

[jonlee]

This depends on a lot of things. Can you give more detail on the platform, processors and so on? DB local or remote? Anything else changed (like changed JDBC drivers)? That might help folks.

[_scottwilliams_]

I've been doing some more research on this, I think the problem is with Microsoft's JDBC Driver.
It looks like their jdbc driver is really really slow on jdk1.4.

I went to their site for this, it looks like they don't 'officially' support 1.4 for their jdbc, even though it runs without any problems (albeit slowly).

[_scottwilliams_]

ok I really found my answer now.
this data function runs much slower on jdk1.4
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));

we were calling that alot. Anyway, changing the code so we don't call that function so often made a huge difference.

I guess jre1.3.1 was more forgiving.