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performance tuning parameters

Former Member
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We have installed 4 SAP components(R/3,Xi,EP,BIW) on single OS (HP-UX)with Oracle. System perfectly working but little bit poor performance.

During installation we have given 8GB memory for all the compoennets , that means each instance 2GB ( 60:40 rule - 1.2GB for Application server ,0.8GB for DB)

All the instances we have installed same . Now we are planing to upgrade extended memory 8GB to 32GB (approx 4times of previous memory)

Now my concern is if i increase extended memory 8GB to 32GB , how it will effect to SAP applications.

Should i go and change instance profile parameters ?

Which profile parameters i should change ?

And what is the memory caluculation proportionality rate for my previous and upgrade memory?

I should change all the 4 components ?

Is there any problem if i change wrong parametrs ?

Please suggest .




Former Member
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Hi Lisa,

SAP takes care of the memory automatically.

No parameter is required to change.

If possible you can increase the Extended Memory Size.

Please check the Note: 146289

Go through the Parameter recomendation in the note.

Reward Points if this helps.


Former Member
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Hi Manish,

Thanks for your reply. You mean we no need to set any addiotaional parametres to get reflect from SAP.

System will it take automatically?

What extended parameter we need to set. And what is the proportionality memory rate.