Re: linux kernel parameters
From: Mladen Gogala <gogala.mladen_at_gmail.com>
Date: Sat, 13 Feb 2021 12:57:04 -0500
Message-ID: <7644c0af-a7d7-3475-848d-4c8551ea4c75_at_gmail.com>
Date: Sat, 13 Feb 2021 12:57:04 -0500
Message-ID: <7644c0af-a7d7-3475-848d-4c8551ea4c75_at_gmail.com>
The problem is that SEMMNS has to be larger or equal than SEMMSL*SEMMNI. Ideally, SEMMNS=SEMMSL*SEMMNI and SEMMSL=SEMOPM.
Semaphores are a subsystem governed by a device driver and have certain syntax. No recommendation which doesn't follow that syntax can be valid.
Regards
On 2/13/21 1:22 AM, dimensional.dba_at_comcast.net wrote:
>
> There are varying Documents in Oracle Support of Oracle
> troubleshooting problems and some of the values in the notes actually
> state the value for those 2 parameters can be up to 32000 on RHEL6
> (Doc ID 2467427.1).
>
> On most of the Exadatas I manage with out of the box settings (UEL6/7)
> those values are set to 2048.
>
-- Mladen Gogala Database Consultant https://dbwhisperer.wordpress.com -- http://www.freelists.org/webpage/oracle-lReceived on Sat Feb 13 2021 - 18:57:04 CET