RE: 11g RedHat 5 and Hugepages

This is pretty much what I am doing, however the parameter-
vm.hugetlb_shm_group=1300
- I am under the impression that this does not apply to RedHat 5, only
to SUSE and a few other varients.
Can anybody that has done this on RedHat 5 verify if this parameter is
needed in /etc/sysctl.conf ?

-----Original Message-----
From: tgascard@xxxxxxxxx [mailto:tgascard@xxxxxxxxx] 
Sent: Tuesday, October 12, 2010 3:48 AM
To: Crisler, Jon
Cc: Oracle-L@xxxxxxxxxxxxx
Subject: 11g RedHat 5 and Hugepages


  Hi,

I did it and is working perfectly well.

My configuration :

Not Using AMM with ASM and database

/etc/sysctl.conf :
vm.nr_hugepages= 12288 -- page size 2MB => 24 GB
vm.hugetlb_shm_group=1300 --id dba, be careful if it's a different user 
between ASM and Database
kernel.shmmax=25769803776 -- => 24 GB
kernel.shmall=6291456 -- page size 4KB =>24 GB

/etc/security/limits.conf :
memlock=25165824 -- KB => 24 GB

/etc/profile
ulimit -u 16384 -n 65536 -l 25165824

To check you are using Huge Page

grep Huge /proc/meminfo

I hope it 'will help.

Thierry.





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