Re: BUG #14206: Switch to using POSIX semaphores on FreeBSD

Maxim Sobolev <sobomax@freebsd.org> writes:
> Tom, on the related note on merits of SYSV semaphores vs. POSIX the
> handling of SYSV semaphore shortage in PG is, uggh, awful. The whole server
> crashes (abort()s), bumping into that on production box is not fun at all
> and it's particularly easy since the resource is severely constrained by
> default. Ideally it should just deny the particular connection request.

This seems like nonsense, because those are acquired once at postmaster
startup, not per connection.  You will need to decrease max_connections
to start successfully in a resource-constrained system, but the same is
true of other resource limits.

            regards, tom lane