on 07-01-2009 12:32 PM
Hi,
Can we increase Roll Area.
What will be the impact by increasing it.
Can u pls tell me the procedure to increse the Roll area.
Thanks,
MK
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Hi,
Yes. Roll area is not so important where sufficnet extended memory is available.
You can visit the page for more understanding on this.
http://help.sap.com/saphelp_nw70/helpdata/en/02/96274f538111d1891b0000e8322f96/content.htm
Rgds,
Mahesh Bansal
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Hi,
The roll area consists of 2 segments. The first segment, which can be set with the parameter ztta/roll_first, is assigned to the work process first as memory. If this is used up, the work process has more memory assigned to it.
The amount of memory is determined by the difference between the parameters ztta/roll_area and ztta/roll_first
The roll area is always the first memory that receives a work process. Only afterwards can extended memory be requested
ztta/roll_area must be larger than, or the same size as ztta/roll_first
By specifying a higher value for ztta/roll_area than for ztta/roll_first, you avoid allocating local private memory as soon as the set limits of the SAP extended memory are reached. The remaining roll memory therefore serves as the last buffer before a user context has to allocate heap memory.
This pushes back the point in time at which a work process is switched to PRIV mode
The roll area is not important with 64 bit platforms where sufficient extended memory is available
These parameters need to be maintained in the Instance profile (tcode RZ10)
Thanks,
Sridhar
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