Re: SHMMAX

From: Carl Bruhn <crb_at_dde.dk>
Date: Fri, 05 Feb 1999 09:44:53 +0100
Message-ID: <36BAAF85.1648C75B@dde.dk>

I don't know about linux but the recomandation from Oracle is on all Unix versions i've seen.
Could be that you only have 32Mb of RAM in your computer and linux is so intelligent that it will only report on how large the largest shared memory segment can be ?.
I've never encountered problems in raising the SHMMAX to 4294967295 on any platform and i dont see there could be a problem. The size of shared memory you use for Oracle is actually adjusted by the size of your SGA. I don't suppose you make your own programs aquiring af lot of shared memory.

raison_at_mc.net wrote:

> Question: I am running Oracle 8.0.5 under RedHat Linux. Works fine.
> However, Oracle suggests that you set the SHMMAX size to 4294967295, which I
> have not done. The database is not in production yet, I am currently
> developing. But I grow paranoid about the shared memory settings. So my
> question is: where do I set this? I have changed things around in sysctl.h,
> but when I boot the new kernel, /proc/sys/kernel/shmmax still reads 33554432.
> Help.
>
> Please reply via email. Thanks.
>
> Kevin Raison
> kevin_at_mc.net
Received on Fri Feb 05 1999 - 02:44:53 CST