On Tue, 25 Jan 2005 11:18:05 -0500, Tom Lane <[EMAIL PROTECTED]> wrote:
> Don Drake <[EMAIL PROTECTED]> writes:
> > This morning I found the postgres not running and the following in my log 
> > file:
> > 2005-01-25 01:38:22 FATAL:  could not create shared memory segment:
> > Cannot allocate memory
> > DETAIL:  Failed system call was shmget(key=5432001, size=273383424, 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 273383424 bytes), reduce PostgreSQL's
> > shared_buffers parameter (currently 32768) and/or its max_connections
> > parameter (currently 40).
> I have seen this happen when the old shmem segment didn't get released
> for some reason, and your kernel settings are such that it won't allow
> creation of two shmem segments of that size at once.  For robustness
> it's probably a good idea to make sure you *can* create two such
> segments at once, but for the moment getting rid of the old one with
> "ipcrm" should be enough to let you restart the postmaster.
>                         regards, tom lane

I was able to just restart it, after the server died and before I
restarted nothing showed up in the ipcs output.

On an unrelated note, the value 273MB seems relatively low to me.  The
DB uses over  27GB for data and indexes, I would think it needs more
shared memory.



Donald Drake
Drake Consulting

---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
      joining column's datatypes do not match

Reply via email to