Re: shared memory problem

I'm not sure if this is related, and unfortunately I
don't have the specific error in front of me, but on
occasion when I restart postgresql, using

$ /etc/rc.d/init.d/postgresql restart

I'll see the shutdown message, then I'll see a shared
memory creation error, which I think looked similar to
the one below.

In the past I would just boot the box, and postgresql
naturally would start up just fine. But last time it
happened I waited a minute, then attempted the restart
again (which obviously would just do a start, as
postgresql wasn't running because of previous
failure.) It started up fine that time.

Perhaps there's some issue with the shared memory not
being freed quickly enough by the kernel?

michael

--- Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> <rocael(at)usa(dot)net> writes:
> > /usr/local/pgsql/bin/postmaster -B 1000 -o "-S
> 2000" -S -D
> > /usr/local/pgsql/data
>
> > and it says:
> > IpcMemoryCreate: shmget failed (Invalid argument)
> key=5432001,
> > size=8899584,permission=600
> > This type of erro is usually caused by an improper
> shared memory or System V
> > IPC semaphore configuration. Form more
> information....
>
> Most likely your kernel isn't set to allow shared
> memory blocks as
> large as 8M.
>
> regards, tom lane

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