bad performance on system, export/import buffer many sawps

[Former Member]

Hello,

I have an ECC 6.0 system on AIX with 6 application servers. There seems to be a performance problem on the system, this issue is being noticed very well when people are trying to save a sale order for example, this operation takes about 10 minutes.

Sometimes we get short dumps TSV_TNEW_PAGE_ALLOC_FAILED or MEMORY_NO_MORE_PAGING but not very often.

I am not very good at studying the performance issues, but from what I could see is that there are may swaps on buffer export/import, program and generic key. Also the HitRatio is 88% at buffer export/import, which I think is pretty low.

I know that the maximum value accepted of swaps per day is 10000, is that right?

Can you please advice me what needs to be done in order for these swaps to decrese and hit ratio to increase? And also what else I should do in order to analyse and root cause and the bad performance of the system?

Many thannks,

manoliv

[Former Member]

@Sravanthi

As a rule of thumb, swap space should equal 
3 x Size of Main Storage or at least 1 GB, whichever is larger

A small correction is swap space is always defined on available physical memory not on storage.

Swap never be 1GB for SAP system as minimum physical memory recommendation for SAP is more than that.

So always SWAP will be 2x, 3x depends on application version and OS limitations.

@Maloniv

Are these dumps occuring on particular application server or on all of the apps servers?

10 minutes of time for order saving indicates a poor peformance of system.

If the dumps are occuring on particular apps server, what is the configuration/HW resources hosted on that?

Regards,

Nick Loy

[Former Member]

@Sravanthi

The output showed is the actual one, without modifications. And is not showing any errors.

@Nick:

I looked and I think this is more as a global problem because the dumps come from almost all appl servers.

If you have any other ideas, please let me know.

Regards,

Manoliv

[Former Member]

Hello,

Does anyone know how to interpret the values below generated with sappfpar check?

regards,

Manoliv

[Former Member]

@Nick

Check the link below on thumb rule of swap space

http://help.sap.com/saphelp_40b/helpdata/fr/02/9625e3538111d1891b0000e8322f96/content.htm

@Maloniv

Did you get chance to go thru the above link?

Please refer to below link which has more information

http://www.wilsonmar.com/sap_perf.htm