This can backfire on you, due to the garbage collection. Adding a lot more memory sounds attractive, but Java does not reuse heap space until it is garbage collected. It will add things to the heap until the space is exhausted, and then start a garbage collection.
The more memory you have, the more abandoned objects there will be on the heap, and the longer the garbage collection will take. You'll see your response times run smoothly... With huge "hiccups" when the heap is exhausted. Unless you have a large number of objects that you expect to be statically allocated over a long period of time, you're probably better off to leave the heap small, and have more, shorter, garbage collections. Your response will be much smoother across the GCs. -- Robert P. Nix Mayo Foundation RO-OC-1-13 (new loc) 200 First Street SW 507-284-0844 Rochester, MN 55905 ----- "In theory, theory and practice are the same, but in practice, theory and practice are different." -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Friedrichs, Jürgen Sent: Friday, December 09, 2005 7:02 AM To: [email protected] Subject: zLinux/SLES9, WebSphere 6.x - recommended max. Java heapsize Hello, when using WebSphere 6.x with SLES9, is there a recommendation or physical limit on the JVM heapsize? I was asked, if we could increase the Java heapsize when moving to SLES9/WAS6 to a much higher value. I would guess that this is an issue of the Java memory handling (i.e. garbage collection) and therefore a question of performance!? With kind regards Juergen Friedrichs, Germany ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
