Re: What's the latest thinking of the best two or threewebdevelopment languages/environ...

I'm on a large 5.4 development box so my experience was a little irrelevant until I saw this post, but I am calling java.lang class methods from RPG in a test job submitted to batch and the JVM starts and responds with first return value at that level very quickly.

rd

Pete Helgren wrote:

Aaron,

I saw similar gains when I moved to the 32bit JVM using JRuby. They have done a remarkable job optimizing the JVM. We have a 520 (processor feature 7355) with 8gb RAM and saw response and startup improve markedly (although I haven't run any official benchmarks). If I recall correctly, the 32bit JVM isn't an option in V5R3M0, only in V5R4M0 and higher. So I can't tell you about how it improved performance on my 270, because my 270 is at V5R3M0. Perhaps someone has had the experience on their 270 and can speak to it. Since the 32bit JVM uses less memory, it can run more efficiently.

The 32bit JVM is definitely where it's at. I'd give it a try if you are on a box that supports it.

Pete


Aaron Bartell wrote:

Dean, do you know if those gains are for smaller machines also? I will be
looking to get another AS400 coming up here and am planning on getting a
low-end one (which oddly enough is more than double of everything since
buying a low-end one two years ago).

I have been meaning to port OpenBravo (open source Java ERP/POS package -
http://openbravo.com) to the AS400 but have been hesistant because that is a
large chunk of Java to run on any underpowered machine.

BTW, Dave Odom, it would be good for you to peruse the different large open
source applications to see how they have been successful with the different
frameworks.

Aaron Bartell
http://mowyourlawn.com


On Fri, Aug 8, 2008 at 6:36 AM, Thorbjørn Ravn Andersen <
thunderaxiom@xxxxxxxxx> wrote:

Dean, Robert skrev den 08-08-2008 12:10:

The new JVMs *are* considerably faster. We realized huge performance

gains (one app server that started in 7 minutes now takes 2) and memory
usage reductions (on the order of 50% less) by moving to the 32-bit JVM.
I was aware of the memory usage reductions, but not that the gain for
large applications would be THAT big.

Great to know :)


--
Thorbjørn Ravn Andersen "... plus... Tubular Bells!"

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