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Thread: Query parallelism

Query parallelism

From
luchot
Date:

Hello everybody ,

I use PostgreSQL 8.1.3 on a bi-processor Xeon and I would know how to do to enable a parallelism for

the execution of  queries. Indeed , when I analyse the use of the cpus during a query the result is that for

some minutes a cpu is used while the other not and after it is the contrary. So they are not used at the same

time and i would know what i have to do in order cpus work together .

Thanks and sorry for my english,

 

Re: Query parallelism

From
"Jim C. Nasby"
Date:
On Mon, Mar 27, 2006 at 04:25:25PM +0200, luchot wrote:
> Hello everybody ,
> I use PostgreSQL 8.1.3 on a bi-processor Xeon and I would know how to do to enable a parallelism for
> the execution of  queries. Indeed , when I analyse the use of the cpus during a query the result is that for
> some minutes a cpu is used while the other not and after it is the contrary. So they are not used at the same
> time and i would know what i have to do in order cpus work together .
> Thanks and sorry for my english,

PostgreSQL has no support for intra-query parallelism at this time.
Greenplum's MPP might do what you're looking for.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461