| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Curt Sampson <cjs(at)cynic(dot)net>, "J(dot) R(dot) Nield" <jrnield(at)usol(dot)com>, PostgreSQL Hacker <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Buffer Management |
| Date: | 2002-06-25 15:02:05 |
| Message-ID: | 200206251502.g5PF25r16113@candle.pha.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Can we mmap WAL without problems? Not sure if there is any gain to it
> > because we just write it and rarely read from it.
>
> Perhaps, but I don't see any point to it.
Agreed. I have been poking around google looking for an article I read
months ago saying that mmap of files is slighly faster in low memory
usage situations, but much slower in high memory usage situations
because the kernel doesn't know as much about the file access in mmap as
it does with stdio. I will find it. :-)
--
Bruce Momjian | http://candle.pha.pa.us
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
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Dave Cramer | 2002-06-25 15:12:57 | Re: Democracy and organisation : let's make a revolution |
| Previous Message | Tom Lane | 2002-06-25 15:00:19 | Re: Buffer Management |