| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | paulo matadr <saddoness(at)yahoo(dot)com(dot)br> |
| Cc: | GENERAL <pgsql-general(at)postgresql(dot)org>, admin <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: [GENERAL] MAX_CONNECTIONS ?? |
| Date: | 2008-11-12 17:41:06 |
| Message-ID: | 491B1532.10605@archonet.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin pgsql-general |
paulo matadr wrote:
> I need help to alter max_connections em my database, this parameter
> stay in defalt MAX_CONNECTIONS=100
> I want to change for MAX_CONNECTIONS=300. about parameters below,
> need to change anything?
>
> 1 -sysctl.conf
>
> kernel.shmmax = 68719476736
> kernel.shmall = 4294967296
Does your shmmax have one digit too many? 68GB?
> # - Memory -
>
> 2-Postgresql.conf
> shared_buffers = 2048MB
> temp_buffers = 12MB
> work_mem = 12MB
> maintenance_work_mem = 128MB
> max_fsm_pages = 4000000
> max_fsm_relations = 5000
Should be OK, depending on your work-load.
One question - what do you plan on doing with 300 active connections?
Unless you've got more than 100 processors in this machine you might
want to consider connection-pooling.
--
Richard Huxton
Archonet Ltd
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