Re: A patch for xlog.c - Mailing list pgsql-patches

From Bruce Momjian
Subject Re: A patch for xlog.c
Date
Msg-id 200102252036.PAA29384@candle.pha.pa.us
Whole thread Raw
In response to Re: A patch for xlog.c  (The Hermit Hacker <scrappy@hub.org>)
Responses Re: A patch for xlog.c  (The Hermit Hacker <scrappy@hub.org>)
List pgsql-patches
> > 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.

--
  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, Pennsylvania 19026

pgsql-patches by date:

Previous
From: The Hermit Hacker
Date:
Subject: Re: A patch for xlog.c
Next
From: The Hermit Hacker
Date:
Subject: Re: A patch for xlog.c