> > could anyone investigate mmap() in many modern UNIX systems to prove that
> > mmap() is so un-portable?
> >
> > it seems mmap() is a portable problem like you said, but I think SYSV
> > shmem for PGSQL is a installation problem. you push some difficults to
> > end user, and take easy taskes for yourself.
>
> Considering that, so far as I can tell, both you and Bruce are the only
> ones that are really heavy on moving away from SysV ... how many ppl are
> actually finding it to be that much more difficult? :)
I am not sure I would call myself _heavy_ on it. I suggest researching
it on platforms that support anon. mmap() to reduce administration load
when increasing the number of buffers. If it is not a big win, there is
no reason to add support for it. We clearly will be keeping SysV for a
long time, so adding another shared memory system, mmap(), should only
be done for a very good reason.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026