Tom Lane wrote: > Curt Sampson <[EMAIL PROTECTED]> writes: > > Note that your proposal of using mmap to replace sysv shared memory > > relies on the behaviour I've described too. > > True, but I was not envisioning mapping an actual file --- at least > on HPUX, the only way to generate an arbitrary-sized shared memory > region is to use MAP_ANONYMOUS and not have the mmap'd area connected > to any file at all. It's not farfetched to think that this aspect > of mmap might work differently from mapping pieces of actual files. > > In practice of course we'd have to restrict use of any such > implementation to platforms where mmap behaves reasonably ... according > to our definition of "reasonably".
Yes, I am told mapping /dev/zero is the same as the anon map. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026 ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
