Oracle-L: RE: Kernel parameters

From: Juan Miranda <j.miranda_at_sermatica.es>
Date: Wed, 07 May 2003 07:01:51 -0800
Message-ID: <F001.0059243C.20030507070151@fatcity.com>

If you have a NUMA system (GS80, 160, 320, 1280) you better use rad_gh_regions.

Look for this doc in wwww.google:

Tru64 UNIX
System Configuration and Tuning
Part Number: AA-RH9GC-TE
September 2002
Product Version: Tru64 UNIX Version 5.1B or higher

-----Mensaje original-----

De: root_at_fatcity.com [mailto:root_at_fatcity.com]En nombre de Rajesh Dayal Enviado el: miércoles, 07 de mayo de 2003 13:57 Para: Multiple recipients of list ORACLE-L Asunto: RE: Kernel parameters

Hi Jack,

GH_CHUNKS is basically a parameter which asks system to reserve the System Memory for the usage of shared memory. This memory is allocated at boot time and cannot be used back by operating system for any other usage. So if you have a system having 3 Gb of RAM and you have nothing running on the system other than Oracle Databases, then it is safe to reserve upto 2 Gb of memory for shared memory. So you can put a value of

gh_chunks = 512

GH_CHUNKS is allocated in the number of 4Mb chunks so 512*4Mb=2Gb.

So your gh_chunks value will depend on your system RAM.

HTH,
Rajesh

PS: Let me know what other parameters you are looking at.

-----Original Message-----

Sent: Monday, May 05, 2003 7:07 AM
To: Multiple recipients of list ORACLE-L

Hi List,

Can somebody give me an example of the kernel settings for TRU64 (preferably) for about 6 instances each with a total sga of 160MB (currently projected) running Oracle 9i (4x) and 8i (2x) The documentation only pre-install settings for 1 instance. Furthermore something about GH CHUNKS

TIA Jack
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Author: Jack van Zanen
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Author: Juan Miranda
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