RE: EJB versus RPG/COBOL

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

> From: David Morris
> 
> I spent this week load testing performance of a large scale java-based
> system running on the iSeries.

David, I'm not saying your application doesn't perform well.  However,
you're not really providing any equivalence figures.  How many green
screen users can you get going?  Do they see the same degradation when
you have 25 users? Or 50?  You need to compare apples to apples to get
meaningful numbers.

Also, there is a difference between inquiries and transaction
processing.  SQL-based inquiries, especially the larger they get, blur
the distinction between Java and RPG because both end up spending most
of their time in the SQL engine.  I've always said that for pure
inquiries (especially ad hoc), SQL performs quite impressively, and that
savings is then passed on to whatever your application is.

But for real transactions, where processing is done on individual
records and rules are based on database flags, RPG outperforms Java by
the 10-100 times figure I specified.

Joe