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Re: SAP performance issues

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Thanks for the info Reagan.

 

Now I'm checking the memory parameters and I'd like to know which should be acceptable values assuming the non standard transactions are well developed and the standard transactions are well used (for example, using filters)?

 

According to my configuration I have the following:

 

Number of workprocess: 45 (DIA + non DIA)

 

Quotas for EM in a WP:

 

ztta/roll_extension_dia ~ 4.5  GB

ztta/roll_extension_nondia ~ 4.5  GB

 

Quotas for Heap memory in a WP:

 

abap/heap_area_dia ~ 4.5 GB

abap/heap_area_nondia ~ 4.5 GB

 

Others:

 

em/initial_size_MB ~ 40 GB

rdisp/ROLL_SHM ~ 256 MB

rdisp/ROLL_MAXFS  ~ 256 MB

rdisp/PG_SHM ~ 256 MB

rdisp/PG_MAXFS ~ 256 MB

abap/heaplimit ~ 40 MB

 

I think the quotas for EM and Heap are to High, what do you think? Does SAP suggest anywhere standard values than the defaults?

 

I've seen DIA users going in PRIV mode with standard transactions, so I guess they may be using the transaction in a wrong way, right? I mean, not using filters and etc.

 

I know that after going PRIV mode the heaplimit can release the memory allocated by a WP restart, but should this value be too low? Is there a disadvantage if the WP restarts regulary?

 

Another question regarding DB space: I have almost all my filesystem at 90% (SAPDATAs), does this give poor system performance? Is this documented anywhere?

 

Regards,

 

JAM


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