RE: keep a java program open

["David Morris" <David.Morris@xxxxxxxxxxxxx>]

David,

I always believed the manuals that said data queues were the fastest
means of interprocess communication and were extremely lightweight.
When I built a high volume event handler using data queues in RPG, I
was disappointed in the initial performance. I combed through my code,

implementing caches (helped quite a bit) and several other ideas.
Finally, I took out the keyed (2 byte key) data queue and replaced it
with a short, fixed length entry and a user space for the variable data

(up to 128 bytes in this case with a seldom used extender). It made a
noticeable difference.

My conclusion is that it may depend and you should plan on testing in
your own environment before assuming that one technique is faster than

another. I would also tend to look toward database for real performance

gains.

David Morris

>>> dawall@us.ibm.com 01/22/02 03:43PM >>>

...Summary -- data queues is the fastest IPC mechanism available via
Toolbox
classes.

David Wall
AS/400 Toolbox for Java