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Re: A patch for xlog.c

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: The Hermit Hacker <scrappy(at)hub(dot)org>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Matthew Kirkwood <matthew(at)hairy(dot)beasts(dot)org>, pgsql-patches(at)postgresql(dot)org
Subject: Re: A patch for xlog.c
Date: 2001-02-25 21:17:40
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackerspgsql-patches
> On Sun, 25 Feb 2001, Bruce Momjian wrote:
> > > > Yes, but typical SysV shared memory limits are much lower than
> > > > per-process limits.
> > >
> > > well, come up with suitable patches for v7.2 and we can see where it goes
> > > ... you seem to think mmap() will do what we require, but, so far, have
> > > been unable to convince anyone to dedicate the time to converting to using
> > > it.  "having to raise/set SysV limits", IMHO, isn't worth the overhaul
> > > that I see having to happen, but, if you can show us the benefits of doing
> > > it other then removing a 'one time administrative config' of an OS, I
> > > imagine that nobody will be able to argue it ...
> >
> > Yea, it is pretty low priority, especially since most OS's don't support
> > ANON mmap().  Most BSD's support it, but I don't think Linux or others
> > do.
> ah, then not a low priority, a non-starter, period ... maybe when all the
> OSs we support move to supporting ANON mmap() :(

Yea, we would have to take a poll to see if the majority support it. 
Right now, I think it is clearly a minority, and not worth the added
confusion for a few platforms.

  Bruce Momjian                        |
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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