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 -- This is the Java Programming on and around the iSeries / AS400 (JAVA400-L) mailing list To post a message email: JAVA400-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/java400-l or email: JAVA400-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/java400-l.
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