SAP Paging Question in SAP ECC with AS400

[Former Member]

Hello Experts,

We have an SAP ECC 6.0 system running on OS400 with db2 (DB400 with V7R1).

We are trying to evaluate the OS performance ,

When we look at the ST06 memory for last 24 hours overview we get the following result.

I know that in windows a permissible value of 20% is allowed .

Can you please tell  me the recommendation for AS400?

Kind Regards,

Jacob

[former_member188883]

Hi Jacob,

For AS400 environment as well 20% limit exists.

Refer SAP help for more details

http://help.sap.com/saphelp_40b/helpdata/EN/02/962824538111d1891b0000e8322f96/content.htm

Number of active work processes: 10
(AS/400 jobs in status RUN)

Number of page faults per active work process: 20 per second

Allows: 200 page faults per second

Paging overhead per work process: 200 ms per second
(accepted average response time of hard disk is 10 ms)

That corresponds to a paging overhead of 20%. The 20% limit should not be exceeded.

Hope this helps.

Regards,

Deepak Kori

[Former Member]

Hello Deepak,

Thanks for the answer.

I had a look at the help.sap.com link. It says for AS 400 the pages in should be equal to pages out .

In our case it is correct. But is "Zero".

How can i evaluate from the screenshot whether it has exceeded 20% threshold or not?

Sorry I haven't worked in AS400 , Please excuse me for asking basic question....

Kind Regards,

Jacob

[former_member188883]

Hi Jacob,

In your case it looks like system is not displaying data correctly. The columns highlighted should not be zero actually.

Can you look into troubleshooting steps for incorrect data on ST06

How to analyse the missing performace data situation and how to check SAPOsCol issues - Netweaver Te...

Refer to relevant SAP notes mentioned in the link above.

Hope this helps.

Regards,

Deepak Kori

[Sriram2009]

Hi Jacob

Could refer the SAP note over all memory parameters and Paging on 5.1

808607 - iSeries: Memory management in a system based on PASE

and SCN link

Regards

Sriram

[Former Member]

Hello ALL,

I am closing the thread.

The issue I am getting is due to not properly configuring ST03 for SAP system.

Sorry I cannot pinpoint the solution. Thanks for your time.

Kind Regards,

Jacob