Re: 7.4 - TODO : IpcSemaphoreCreate: No space left on

On Thu, 2002-12-05 at 10:13, Dan Langille wrote:
> This error is accompanied by a suggestion to change SEMMNI or SEMMNS.
> In this case, that suggestion is not appropriate. Read below for
> the scenario.

> Suggestion: Can we modify the error message to include checking for a
> running postmaster?

What basically happened is that you were running two copies of the
postmaster at the same time, so you needed enough shared memory +
semaphores for both of them. There's no fundamental difference between
using up all your shared memory with other postmasters, or with other
applications that use shm/semaphores. In either case, the postmaster's
error message is still valid:

It occurs when either the system limit for the maximum number of
semaphore sets (SEMMNI), or the system wide maximum number of
semaphores (SEMMNS), would be exceeded. You need to raise the
respective kernel parameter.

... although it perhaps doesn't tell the entire truth. Would it be
sufficient to add a note to the documentation about the possibility of
other applications using shared memory / semaphores?

Cheers,

Neil
--
Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC