Regarding Portal Performance

HI friends:
   after some time running, Portal memory seems to be overflow, users can't log onto the
system, error  says iviews couldn't be reached,  when restart server, everything recover,
could you please tell me how release those memory which seems not to be released automatically
thank you very much

Hello ,
You need to set JVM Parameter to collect the Heap Dump, Core Dump ,
Add jvm parameters:
-Xmx30m -XX:+HeapDumpOnOutOfMemoryError (SUN JVM) to limit the maximum to 30MB and
trigger a heap dump when out of memory error occurred
-Xdump:system:events=user,request=exclusiveprepwalkcompact for manually triggering of core dump
Issues could be following,
Long GC Pause Times for Class unloading times , High Paging in your system.
Frquent Garbage Collection for Insufficient heap size for the nursery area & tenure area.
Realu201D OOM, where a new allocation request can not be satisfied by the JVM.
I will advise you to create an OSS Message for this issue and follow the instruction based on the issue.
While there will be system hung situation , need to collect heap , core and thread dump from where you can start investigation.
As result , you may need to upgrade your JVM / Change in JVM Parameter / Increasing Hardware resource.
Regards
Sumanta

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