Local roll area and Roll area

[Former Member]

Please refer to following contents from TADM12_2:

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1. Virtual Memory includes local memory and shared memory.

2. Local memory is associated with individual work processes.

3. Local work processes memory is for: ABAP load; Data, stack; Buffer for database transfer; Local roll area; Local paging area.

4. The roll file and its associated buffer(also called Roll area).

5. The page file and its associated buffer(also called (SAP) Paging area).

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In t-code ST02,

1. the first part is Buffer, all of them belong to shared memory.

2. the second part is SAP Memory, there are four sub-items:

a)Roll area

b)Page area

c)Extended memory --> in shared memory

d)Heap memory --> in local memory

I am confused whether Roll Area and Page Area here means local Roll/Paging Area in local memory, or Roll/Paging Buffer in shared memory?

Please advise. Thanks

James

[Former Member · Accepted solution]

Hi James,

Roll Area and page area allocated on local memory, and their buffer areas are allocated on local memory, also. This is because roll and page area are first two block on memory diagram. Those memory areas are dedicated to a work process and start to use when extented memory is filled up. Take a look at "http://help.sap.com/saphelp_nw70/helpdata/EN/28/d1d3f6bcb411d188b30000e83539c3/frameset.htm" for the memory diagram on SAP

Best regards,

Orkun Gedik

[Former Member · Accepted solution]

Your reply made me confused, especially for this sentence - "Roll Area and page area allocated on local memory, and their buffer areas are allocated on local memory", and I can not open the link. Could you please give me more advise? Thanks.

[Former Member · Accepted solution]

Hi,

There is common share area of every workprocess,

and every workprocess has its own internal memory,

Regards,

Vamshi.

[Former Member · Accepted solution]

Hi,

Roll Area and page area allocated on local memory, and their buffer areas are allocated on local memory, also

Which means that Roll Area, page area and their buffer areas are allocated on local memory. This is because they are allocated when extended memory is filled-up.

Best regards,

Orkun Gedik

[Former Member · Accepted solution]

Yes, but they are also allocated heap memory when both buffer area and extended memory are filled-up.

Your advice "Roll Area and page area allocated on local memory, and their buffer areas are allocated on local memory, also" is different with the concept on TADM12 course, that is, roll area is in local memory, roll buffer is in shared memory, not local memory. Still confused