Re: shmget fails on OS X with proper settings

if you're getting memory errors then a guess would be did they take out any
memory out of your machine or perhaps did they change your memory cache
parameters???
Martin
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----- Original Message -----
From: "Christopher S Martin" <martin(dot)christopher(dot)s(at)gmail(dot)com>
To: <pgsql-general(at)postgresql(dot)org>
Sent: Sunday, May 06, 2007 3:07 PM
Subject: [GENERAL] shmget fails on OS X with proper settings

> Hi to the list, its my first post.
>
> I was previous running postgres 8.2.1 on my OS X 10.4.9 laptop with no
> problems.
> After I sent it to apple care, I found that I can no longer start the
> postmaster daemon. When I try, I receive the standard shmget failed
> error message:
>
> FATAL: could not create shared memory segment: Cannot allocate memory
> DETAIL: Failed system call was shmget(key=5432001, size=4112384, 03600).
> HINT: This error usually means that PostgreSQL's request for a shared
> memory segment exceeded available memory or swap space. To reduce the
> request size (currently 4112384 bytes), reduce PostgreSQL's
> shared_buffers parameter (currently 300) and/or its max_connections
> parameter (currently 30).
>
> I get this error with either the settings recommended on the kernel
> resources page:
>
> kern.sysv.shmmax=4194304
> kern.sysv.shmmin=1
> kern.sysv.shmmni=32
> kern.sysv.shmseg=8
> kern.sysv.shmall=1024
>
> And I also get it when i set kern.sysv.shmmax=12582912
>
> After making all these changed rebooting doesn't fix anything.
>
> Has anyone ran into this problem, or has any idea as to why this would
> start to fail so suddenly?
>
> Thanks,
> Chris
>
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