Few of us have the resources to actually try this, but Java on i should
run significantly faster than other platforms when you get above about 8
processors. Why? Capability-based addressing and single level store
offer significant performance features for synchronizing multi-threaded
applications in multi-processor environments. (The classic JVM utilizes
these features.) Single-threaded work loads on single processor machines
are going to run faster in environments that don't have the overhead of
capability-based addressing.
There's also some overhead in sharing resources like disk and ethernet
cards. If you can configure your machine to run your application with
almost dedicated access to these resources your application will run
faster. Such cofigurations are possible on i, but not commonly done.
They do require money and a high level of expertise. (As Al Barsa would
say, invoke the SPDMNY command.)
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James Perkins
Sent: Thursday, December 10, 2009 11:19 AM
To: Midrange Systems Technical Discussion
Subject: Re: Would it be a reasonable to ask IBM's programmers to, write
a %sortsfl(sfl: column)
I have not completely followed this thread, but I do run Java on IBM i.
With the new 32-bit version for 5.4 and 6.1 it runs significantly
faster. In fact, when I switch WebSphere Application Server to use the
32-bit version over the Classic JVM, my start-up time improves by 50%
sometimes. In fact on a new box with 6.1 I can get WAS to start-up in
less than a minute. To me, that's impressive.
--
James R. Perkins
http://twitter.com/the_jamezp=
--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit:
http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at
http://archive.midrange.com/midrange-l.
midrange.com
