For a 64 bit machine..does the higher shared buffer setting really
offer a significant improvement over a 32 bit lower setting coupled
with linux caching ? Is the postgres shared buffer algorithm superior
to the linux caching algorithm to favor a switch to 64 bit
On Fri, Sep 11, 2009 at 9:50 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Nicolas Michel <nicolas.michel@lemail.be> writes:
>> - I have 16Go of RAM on that server (but 32bits OS with bigmem kernel ;
>> so I set shared buffer to 350000 (~2,7GB) for a shmmax of 4000000000
>> (~3,8GB)
>
> On a 32-bit machine that's just insane. You've got something like 300MB
> left over in the process address space (assuming the typical 1Gb for
> kernel split). No wonder things are falling over. Try putting
> shared_buffers somewhere around 1Gb. Or switch to 64-bit.
>
> regards, tom lane
>
> --
> Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-admin
>