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Oracle 8i Kernel parameter 'SHMMIN'

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ISS Unix Admin
Occasional Advisor

Oracle 8i Kernel parameter 'SHMMIN'

The Oracle 8i installation notes refer to a kernel parameter 'shmmin'.

I cannot find any reference to this parameter on HPUX11.0.

Has it been superceded/replaced or is it not valid in HPUX11.0 anymore?


James R. Ferguson
Acclaimed Contributor

Re: Oracle 8i Kernel parameter 'SHMMIN'


I suspect you mean "smhmni" [an easy transposition of letters :-)]. Take a look at this document for the details of kernel parameters:

Hopefully this is what you need.

Andreas D. Skjervold
Honored Contributor

Re: Oracle 8i Kernel parameter 'SHMMIN'

Think Leon has spelled it right: SHMMIN; Minimum size of a single shared memory segment.

Have noticed that this parameter is in the Oracle install documents, but isn't present in the hp-ux system.

As you set SHMMAX = Physical RAM size, your memory segments will be according to the SGA definition in init.ora (ie 1 segment pr database), and you'll need no reference to the smallest allowable size.

Haven't experienced any problems on our systems running without this parameter.
(The Sun boxes has it, but I can't spot any difference in the way Oracle uses memory)

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