on 2010 Nov 16 6:11 PM
Dear All,
Our current configuration is
SAP ECC 5.0 Release 6.40 Level 16
Oracle 10.2.0.2.0
HP/UX 11iv1
48 GB memory
Our extended memory setting is
em/initial_size_MB = 8000
em/blocksize_KB = 1024
Disclaiming parameters not set
es/disclaim_threshold_MB
es/blockdisclaimsize_KB
I have read Note 835474 and I would like to increase the extended memory to
em/initial_size_MB = 12000
em/blocksize_KB = 4096
Calculated from st02 and st04, my total SAP and Oracle memory usage is 24.5 GB.
Are there any risks involved? Should I need to set the disclaiming parameters as well? If yes, what are the good starting points?
Thank you,
Hon
Request clarification before answering.
Hello Hon
em/initial_size_MB = 12000
em/blocksize_KB = 4096
These would not be a problem as long as you have sufficient extended memory on your HP/UX server which should be the case if this is the only SAP system running on it.
"Calculated from st02 and st04, my total SAP and Oracle memory usage is 24.5 GB."
You can use sappfpar to check the Abap 'worst case' consumption.
Setting the em/initial_size_MB higher only makes sense if the value is actually reached by your users daily use. Which you can easily get from ST02 if the maximum is reached (historical information also available).
If the SAP system has a Java stack it is very important that the memory consumed by the J2EE engine fits in the extended memory (so you should have < 100% memory use on your HP/UX server).
There is no real need to start setting those disclaimer parameters in your case.
I don't see any "risk" in setting those parameters when taking into account above information.
Kind regards
Tom
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Hello Hon
The effect of the blocksize_KB change from 1024 to 4096 is that when memory is allocated, a bigger part is allocated, which has advantages and disadvantages. The advantage is better performance, the disadvantage is that more memory is consumed as the block size is larger but since you have enough extended memory it won't be a problem.
Kind regards
Tom
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