Hi SAP community,
first of all. I know we need to migrate to 64bit and how to do it, but this is not the topic of this question. I'm looking for a short term fix (before an eventual move to 64bit).
So currently a customer is running an outdated Portal system (NW 04, 640 32bit kernel on Windows 2003 32bit with 12Gb RAM)
Logically they ran into performance issues and I have been looking into their configuration.
Here's an extract of the relevant memory entries from their Java server instances:
-Xmx1024M
-Xms1024M
-XX:MaxNewSize=171M
-XX:NewSize=171M
-XX:MaxPermSize=192M
-XX:PermSize=192M
The current Virtual Memory Utilisation of the server processes is about 1,35Gb, so there is still a margin to increase it somewhat keeping the memory limitations of a 32bit system in mind)
According to note 723909 this has all been setup as recommended by SAP. But they recommend to increase the permsize if additional applications are deployed.
So here are my questions.
1. Has anyone increased the heap to over 1024Mb on a 32bit system?
2.Would you opt for increasing the heap size with 256Mb instead of increasing the Perm Size with 256Mb?
3. Is there a reason why one would not set the /3GB option in the boot.ini file?
See: Large memory support is available in Windows Server 2003 and in Windows 2000
Currently this is the setting:
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Windows Server 2003, Enterprise" /fastdetect /noexecute=optout /pae
Related notes:
http://service.sap.com/sap/support/notes/664607
http://service.sap.com/sap/support/notes/736462
http://service.sap.com/sap/support/notes/853696
http://service.sap.com/sap/support/notes/313347
Thanks in advance for your advice ;-)
Regards,
Dieter