ST06 Physical Mem free is low

[Former Member]

My system ECC 6 EHP4 runs on AIX 5.3 and Oracle database. Physical memory 24GB.

I have a performance problem due to memory problem, since in ST06 - Physical mem free is always low, only around 300MB in idle condition. When users log in and do transaction the system then runs out of free memory.

I don't know what process that consumed the memory.

ST06 - Top CPU didn't show any process with high memory usage, total memory usage in ST06-Top CPU only show 1GB.

In SM04, total memory usage only show around 600 MB.

I think, there is a missconfigured setting that caused the system could not utilized all the 24 GB memory.

Do you have any idea where should i check?

Regards,

Fendhy

[ImtiazKaredia]

This may be because of the memory allocated on start of Database and SAP.

Check how much memory is allocated on database (SGA, PGA)

Also how much memory is assigned to SAP. you can use sappfpar program to check this.

If the sum of both memory allocation + OS memory requirement + other apps is nearly 24 GB you will always see 300MB free.

What is your total SWAP space? More memory requirement will be met by swap space which will result in swapping.

If swapping is high you will have performance degradation.

In that case you will have to increase main memory or decrease memory allocation at startup to database and SAP.

[sivakumar_kilari3]

Check OS level using this command : svmon -G

Thanks

Siva