Re: Shared memory segment error

Hello,

Which OS are you running? If you are running Linux (RH or SuSE) you can
just increase the setting per the sysctl.conf

kernel.shmmax = 65536 (64 megs or whatever you wish).

Sincerely,

Joshua D. Drake

Alexander Cohen wrote:

> Hi, sometimes ill get this error:
>
> FATAL: could not create shared memory segment: Cannot allocate memory
> DETAIL: Failed system call was shmget(key=2, size=4153344, 03600).
> HINT: This error usually means that PostgreSQL's request for a shared
> memory segment exceeded available memory or swap space. To reduce the
> request size (currently 4153344 bytes), reduce PostgreSQL's
> shared_buffers parameter (currently 400) and/or its max_connections
> parameter (currently 20).
> The PostgreSQL documentation contains more information about
> shared memory configuration.
>
> I was what exactly this shared memory space is used for and what size
> is good to set it to. I need to be able to start up many backends
> (postgres) without using the postmaster.
>
> thanks!
>

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