Re: Posix Shared Mem patch

Andres Freund <andres@2ndquadrant.com> writes:
> Btw, RhodiumToad/Andrew Gierth on irc talked about a reason why sysv shared 
> memory might be advantageous on some platforms. E.g. on freebsd there is the 
> kern.ipc.shm_use_phys setting which prevents paging out shared memory and also 
> seems to make tlb translation cheaper. There does not seem to exist an 
> alternative for anonymous mmap.

Isn't that mlock()?

> So maybe we should make that a config option? 

I'd really rather not.  If we're going to go in this direction, we
should just go there.
        regards, tom lane