System for 9iAS

Hi,
How does 9iAS and Infrastructure run on one system? What would be the minimum amount of memory for it to work properly without lag? 2 gig? 4 gig? 6 gig? Or is it better to run on 2 different systems? 1 for 9iAS and 1 for Infrastructure?

Tuning the JVM depends also on your application.
In iAS you can add JVM Parameters to the opmn.xml for each OC4J Instance. You have to profile your application in order to determine the correct VM configuration and consider the requirements of the OC4J. Unfortunaly the default configuration is bad. You should add at least add the -sever flag which is available in JDK 1.3.1 used in iAS.
JDK 1.4.2 offering is offering new features for multiprocessor machines so a good basic stardup would be
-server -XX:+AgressiveHeap
which turns on a Parallel Garbage Collector and increase maximum heap size. But there is a point where a single JVM will not be sufficent. Then you have to spwan new JVM processes using the Island concept in iAS.
I guess this is a good startup guide:
http://developer.java.sun.com/developer/technicalArticles/Programming/turbo/
http://java.sun.com/docs/hotspot/gc1.4.2/index.html
Good look
Toby

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