Kernel Parameter Update

[Former Member]

Best Friends

Recently added new hardware to a production server, before I had:

06 cpu

24 Gb Mem

Now you have:

08 cpu

32Gb Mem

After that, evaluate SGA Delk increase server area was very small, the area now has 8GB SGA

The parameters to increase in this activity increased SGA were:

Before Now

sga_max_size 03Gb 08Gb

db_cache_size 02Gb 04Gb

SHARED_POOL_SIZE 816Mb 2.4Gb

shared_pool_reserved_size 84Mb 245 Mb

What I'm not clear is the following,:

After increasing CPU and memory on the server and then adjust these parameters of the SGA, I have to adjust or increase any kernel parameter value??

[Former Member]

Kernel parameters depend largely on your operating system.

How could anybody here tell you which parameter to change if you don't tell us what your operating system is?

A SAP notes search will show you recommendations for your OS.

[Former Member]

Hi Friends,

That's the point, I know the parameters needed depending on the SAP installation should have some defaults.

But here, after increasing CPU and memory, there is also some connection to increase certain parameters at the kernel level?

I do not know.

So my consuls, if I increase some kernel parameters.

Thank you for your attention

[Former Member]

In my scenario is HPUX 11.23

Best Regards

[Former Member]

Hello Jose,

how about buying a book like "SAP Performance Optimization Guide" from Thomas Schneider?

It is well woth the money and will provide you with quite a lot of background information. I once

read an old version and it helped me a lot. Performance issues will pop up regularly anyway,

and such issues are difficult to discuss here in the forums.

Regards,

Mark

[Former Member]

Hi Mark

Thanks for your feedback.

Wait some other colleague can help me with some other recommendation for my question.

Best regards

Jose

[Former Member]

After increasing CPU and memory on the server and then adjust these parameters of the SGA, I have to adjust or increase any kernel parameter value??

Which Kernel Parameters are you talking about?

Thanks

SM