Re: [Postgres-xc-general] Infrastructure Suggestions

On Wed, Jan 16, 2013 at 12:41 AM, Arni Sumarlidason <
Arn...@md...> wrote:

>  Good Morning Everyone,****
>
> ** **
>
> We are setting up a 25 node postgres-xc cluster, does anyone have suggests
> on how much disk space a coordinator uses with its local database?
>
Not that much, Coordinator contains only catalog information. I let at your
appreciation the amount of space you think you need, but not gigs for sure.

****
>
> Also hints regarding the memory section in postgresql.conf would be
> awesome!
>
I would do the settings of shared_buffers, work_mem, maintenance_work_mem
and effective cache size on Datanodes as on normal PostgreSQL servers.
For Coordinators, you don't need that much memory except if you have sort
operations happening there, in this case adapt work_mem. You can also set
up shared_buffers to put all the catalog information on-cache, but I do not
think it is that much a win.

Thanks,
-- 
Michael Paquier
http://michael.otacoo.com