SAP memory release

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Zavaros
Posts: 757
Joined: Thu Oct 24, 2002 10:50 pm
Location: Hungary

SAP memory release

Post by Zavaros » Mon Feb 27, 2017 1:14 pm

hello colleagues,

do you know about any document that describes when and how is the memory allocated by user released.

As I know the Extended memory and heap should be freed when the user finishes the transaction. I communicated it to Customer also.
Current issue is that a single user grabs all available page memory (bugged F-03 transaction) therefore that all other users dumps with NO_PAGE_MEMORY error until the user logs out.

So I would like to prepare for next Customer session to avoid further decrease of trust. :oops:

Regards,
Zav

Snowy
Posts: 28792
Joined: Mon Oct 21, 2002 2:33 pm
Location: 3.1415926535

Re: SAP memory release

Post by Snowy » Tue Feb 28, 2017 1:31 pm

Hi,

Shat is your OS? depending on the OS, your SAP memory parameters might not be right and then causing this issue.

I had this situation when I migrated from AIX to Linux... a parameters was too low.

Thanks.

Zavaros
Posts: 757
Joined: Thu Oct 24, 2002 10:50 pm
Location: Hungary

Re: SAP memory release

Post by Zavaros » Thu Mar 02, 2017 9:30 am

Hi,

well ... it is linux.

Regards,
Zav

Snowy
Posts: 28792
Joined: Mon Oct 21, 2002 2:33 pm
Location: 3.1415926535

Re: SAP memory release

Post by Snowy » Tue Mar 07, 2017 11:26 am

Please check SAP note 941735

https://launchpad.support.sap.com/#/notes/941735

If you System is with SAP Kernel 7.40 and higher:
With SAP Kernel 7.40, some general improvements in SAP memory management system are available: In this way, for example, the ROLL memory was removed, and the zero administration memory management based on PHYS_MEMSIZE was reintroduced. For more information, see SAP Note 2085980.
In addition, much of the table buffer has been reimplimented and the parameter "rsdb/tbi_buffer_area_MB" has been introduced as a result. SAP Note 2103827 describes its dimensioning and provides further details.

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