Re: SHM, Issue attaching Oracle >500MB shared mem

[Matthew Kirkwood <weejock@ferret.lmh.ox.ac.uk>]

On Thu, 5 Aug 1999, Javan Dempsey wrote:

> We're currently running a number of Linux based ia32 Oracle 8.0.5 DB
> Servers, and we seem to be running into a problem with attaching to >
> 500MB shared mem. I've increased SHMMAX and tweaked various other
> things in an attempt to fix the problem. Nothing seems to work, no
> matter what SHMMAX is set to, or anything else. SVRMGRL gives this
> error when trying to startup -

Where did you change this value?

Your capitals would seem to indicate that you hacked on the kernel,
but the new place to tune such parameters is /proc/sys/kernel/shmmax.

It would seem to default to 32Mb, which isn't nearly enough for a
big Oracle setup.

# echo `expr 1024 \* 1024 \* 1024` > /proc/sys/kernel/shmmax

should allow you 1Gb of shared memory.

Matthew.

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