Paging memory value mismatch in ST02

[Former Member]

Dear Experts,

In rz11, current value for  paging parametrs are given below:-

rdisp/PG_MAXFS-> 1048576 kb  (OnDisk)

rdisp/PG_SHM-> 524288 kb     (In Mem)

but when we check in ST02 in page area row, OnDisk value is 524288kb This should be equal to rdisp/PG_MAXFS ….

What might be the reason….

[divyanshu_srivastava3 · Accepted solution]

Hi Sumit,

What you are seeing in ST02 is completely OK and the changes you made to the parameters are fine too. The point here is the filesystem amount that you see in ST02 is equal to MAXFS minus SHM amount. In your case: 1048576 - 524288 = 524288

Regards,

Divyanshu

[Former Member · Accepted solution]

Hi Divyanshu,

Means, Paging file can grow upto 524288 at OS level despite of 1048576.  I am confused. Can you please elaborate this concept. Why system not taking parameter value->1048576 OR Is it SAP standard.

Your help is really appreciated

[divyanshu_srivastava3 · Accepted solution]

Hi Sumit,

The parameter rdisp/PG_MAXFS is the total amount of Page (Filesystem+SHM) set. So, this parameter does not set the value for the file system directly.

It is used to specify the maximum size of page set which includes the the quotas for FS and SHM.

Divyanshu

[Former Member · Accepted solution]

  Hi  Divyanshu,

Very thankful to you. This is totally new to me. I googled a lot on Memory management concepts but never found this.

Please let me know, Does this same thing apply in roll file case...

[divyanshu_srivastava3 · Accepted solution]

Hi Sumit,

Yes, this applies to both, roll and page areas.

Divyanshu

[divyanshu_srivastava3 · Accepted solution]

Hi Sumit, Please mark the correct answer and closed the thread. I would appreciate if you award me points for this.....

Regards,

Divyanshu

[Reagan]

Hello

You should read this note. This note answers your question

1627534  - How are the SAP Roll area and Page area set in the SAP system?

Cheers

RB

[divyanshu_srivastava3]

Hi Benjamin....

I have already given the correct reply..... thanx for the notes..... it says the same....

Divyanshu

[Former Member]

Hi Sumit,

You can re-start your SAP and check once.

[Former Member]

   Hi Srinivasan,

  Thanks for reply. I don't think, it's related to restart the system. Every month, we do start-stop for backup....  Reason may be some different....

[Former Member]

http://help.sap.com/saphelp_40b/helpdata/EN/02/9627f0538111d1891b0000e8322f96/content.htm

[Former Member]

  Hi Srinivasan,

Link provided by you is for window NT, We have Suse Linux.