Memory utilization presented in Application Server Control

Hi
I have Oracle Application Server 10g R3 Patch Set 5 application server, which work in cluster. On mian page in Oracle Application Server Control I have memory column, where I can see information about memory utilization. I wonder about this information. For example, I have heap size set for 2 GB and application uses 300MB, but I have on main page Application Server Control 900 MB memory utilization for OC4J container. Why is so difference between use heap space memory (only 300 MB), and this information 900 MB? But sometimes, memory in Server Control rises to 2 GB, but application uses 300 MB heap space still. Why does occur this situation (much difference between uses heap space and memory presented on Server Control)?
Thanks awfully for help.
Regards
Edited by: Luk004 on 2012-01-16 03:30

> Central Instance : 1.2GB is physical memory is free out of 12GB.
> App1 Instance: 400MB is physical memory is free out of 10GB.
> App2 Instance: 2GB is physical memory is free out of 14GB.
>
> Right now, no background for dialog process are running in any of the three instances but still ocuupy lot of physical memory.
>
> Questions: How to calculate memory in ECC and where could be the rest of memory defined in system? No process is running and all memory seem to be consumed.
Memory is allocated
- by the operating system itself
- by the database (SGA_TARGET)
- by the application server buffers (ST02 et al)
- by the operating system as filesystem cache (if you e. g. use VxFS you may configure the memory consumption)
To see where the memory is being used, use OS tools like 'glance' or 'top'.
Markus

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