Re: Running java on Iseries

[Franco Biaggi <fbiaggi@xxxxxxxxxx>]

Thanks,
some additions, to have some compares,
start Tomcat on a PC accessing AS/400 resources 1-10 seconds
the same on OS/400 (om V5R3M0 ) 2-30 minutes (same on PASE) (do not
speech on prv, releases of OS/400),
is this the faster java platform as publisher by IBM ?
GC runninge on PC in millisSec'd  take minuts ( 1-8 on OS/400) !


albartell wrote:
> Good points Franco. The main area's I have found problems is when I try to
> start up the JVM for each users job, or rather, OS/400 starts up a JVM for
> each user before they access the Java code being called.  It would be great
> if users could share a named JVM, but I am sure there would be complications
> there also.  It would almost be like the OS/400 folks having to rewrite a
> servlet engine JVM for the native side of things.
>
> The way around this is to have your RPG (or what have you) talk to the Java
> via data queues.  This makes it so the Java is only running in one batch job
> (emphasis on batch) and the JVM startup is only incurred once.  I have an
> article coming out in the next week in ibmsystemsmag.com that gives example
> of this approach through some open source code I wrote.
>
> HTH,
> Aaron Bartell
> http://mowyourlawn.com
>
>
>
> -----Original Message-----
> From: java400-l-bounces@xxxxxxxxxxxx [mailto:java400-l-bounces@xxxxxxxxxxxx]
> On Behalf Of Franco Biaggi
> Sent: Tuesday, October 03, 2006 3:09 PM
> To: Java Programming on and around the iSeries / AS400
> Subject: Re: Running java on Iseries
>
> Hello,
> sorry for my bad English, just my opinion,
> 32 year of IBM systems knowledge, seem all the systems in each range, java
> on OS/400 is very bad, we are running a lot of applications on it, I have a
> lproblems with memory, GC, swap, etc.performace problems, even running on
> V5R3, The performance is (not)comparable to a win-box -> 1:10 on linux-box
> 1:12 look at the GC (garbagec collector) is taking a lot of time, even no
> swapping (think) involved.
> Place a little PC connected (no changes required) and it works maybe 1:100
> faster.
>
> Ciao (make problems ?)
> Franco
> --
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