Res: [ADMIN] MAX_CONNECTIONS ??

[paulo matadr <saddoness@xxxxxxxxxxxx>]

Only kernel.shmmax have

importance in this case?
about kernel.shmmax it has configured not by me.

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De: Richard Huxton <dev@xxxxxxxxxxxx>
Para: paulo matadr <saddoness@xxxxxxxxxxxx>
Cc: GENERAL <pgsql-general@xxxxxxxxxxxxxx>; admin <pgsql-admin@xxxxxxxxxxxxxx>
Enviadas: Quarta-feira, 12 de Novembro de 2008 14:41:06
Assunto: Re: [ADMIN] MAX_CONNECTIONS ??

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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