Re: shmget fails on OS X with proper settings

Hello,

The previously running postmaster process might not closed properly and
released the kernel's memory.
Check for any process running on the server if it exists then kill the
process.here due to unrelease of kernel's memory and while booting the
process is not releasing shared memory hence leading to problems.

regards
Prashant Ranjalkar
EnterpriseDB

On 5/7/07, Christopher S Martin <martin(dot)christopher(dot)s(at)gmail(dot)com> wrote:
>
> Martin:
>
> They didn't take any memory out of the machine. AS for memory cache
> parameters, I'm don't know about that. How would I go checking for
> that type of thing?
>
> Thanks,
> Chris
>
> On 5/6/07, Martin Gainty <mgainty(at)hotmail(dot)com> wrote:
> > 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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