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Home -> Community -> Mailing Lists -> Oracle-L -> RE: oracle/solaris 10 memory and swap
General Unix rule of thumb is that swap must be twice real ram. That's been around for a VERY long time & never fails. BTW: from the Oracle Solaris installation manual:
2.2 Checking the Hardware Requirements
The system must meet the following minimum hardware requirements:
RAM Swap Space
Between 1024 MB and 2048 MB
1.5 times the size of RAM
Between 2049 MB and 8192 MB
Equal to the size of RAM
More than 8192 MB
0.75 times the size of RAM
*
That comes to 12GB in your case.
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From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Alvaro Jose
Fernandez
Sent: Friday, October 05, 2007 9:46 AM
To: andrew.kerber_at_gmail.com; oracle-l
Subject: RE: oracle/solaris 10 memory and swap
Andrew,
>My sysadmin says 8g swap is plenty. Before I ask him to show me his
Oracle dba credentials, can someone point me to a somewhere that has
more informatiion on this.
I runned a 9207 RAC on Solaris 9 64bits, with vxvm also and suncluster 3.0 (2-node), DISM configured and used, and have in the past problem due to swap shortage.
Sorry I cannot tell you specifics abot Solaris 10 (for the shmmax settings), but based on the previous experience, allocating 12 Gbyte of swap for a 16 Gbyte node is not unreasonable at all.
If the sysadm gets picky about this, tell him to put in writing the decision :-)
alvaro
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-- http://www.freelists.org/webpage/oracle-lReceived on Fri Oct 05 2007 - 09:34:09 CDT
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