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kernel parameters [message #360541] Fri, 21 November 2008 05:36 Go to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
Hello ,

I was asked to specify the kerenel parameters and our RAM size is - 32 Gb and the swap is - 8 Gb.

After a lot of Googling , I did specify as

kernel.shmall=2097152
kernel.shmmax=4294967296
kernel.shmmni=4096
kernel.sem=250 32000 100 128
fs.file-max=65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_default = 262144
net.core.wmem_max = 262144

I'd like to know if they are correct . Kindly guide me .

Regards,
Raj
Re: kernel parameters [message #360551 is a reply to message #360541] Fri, 21 November 2008 05:53 Go to previous messageGo to next message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
>>I'd like to know if they are correct
Nobody can certify that. If there are "specific" standard values, Oracle would have made it mandatory.
Just gander into the Oracle doc.
There would be a recommended minimal values. In most of the cases, that will do.
If you will add more instances in future, and if you find issues with the current settings, you can always change the semaphore settings.
I would also invest some quality time in trying to understand those parameters and its values.
Re: kernel parameters [message #360557 is a reply to message #360551] Fri, 21 November 2008 06:29 Go to previous messageGo to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
But my only doubt is that can we take those values into consideration for Oracle 10g.

And I've read that the SHMMAX is to be configured as .5 times the size of the physical memory .

please help me on this .
Re: kernel parameters [message #360558 is a reply to message #360551] Fri, 21 November 2008 06:31 Go to previous messageGo to next message
rsreddy28
Messages: 295
Registered: May 2007
Senior Member
But my only doubt is that can we take those values into consideration for Oracle 10g. And the values are taken from Oracle Documentation only.

And I've read that the SHMMAX is to be configured as .5 times the size of the physical memory .

please help me on this .
Re: kernel parameters [message #360565 is a reply to message #360558] Fri, 21 November 2008 07:05 Go to previous message
Mahesh Rajendran
Messages: 10615
Registered: March 2002
Location: oracleDocoVille
Senior Member
Account Moderator
quoting myself.
Quote:
Just gander into the Oracle doc.
There would be a recommended minimal values. In most of the cases, that will do.
If you will add more instances in future, and if you find issues with the current settings, you can always change the semaphore settings.
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