From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | maryedie(at)osdl(dot)org |
Cc: | Mark Wong <markw(at)osdl(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com> |
Subject: | Re: [HACKERS] data on devel code perf dip |
Date: | 2005-08-12 20:41:45 |
Message-ID: | 200508122041.j7CKfjc25914@candle.pha.pa.us |
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Lists: | pgsql-hackers pgsql-patches |
Mary Edie Meredith wrote:
> On Fri, 2005-08-12 at 14:53 -0400, Bruce Momjian wrote:
> > Mary Edie Meredith wrote:
> > > Just to be certain I know what I have and how to use it,
> > > please confirm the following is correct.
> > >
> > > According to Markw, the tarball we have at OSDL that is
> > > dated 7/29 already has the O_DIRECT patch + wal grouping
> > > applied. Hence, I will use the one from the day before:
> > > postgresql-20050728.tar.bz2 and apply your patch.
> >
> > Right, or use patch -R to reverse out the changes and revert to a
> > version with O_DIRECT.
> > >
> > > I expect to have, after applying the patch, the O_DIRECT patch
> > > for the log (which I should not be using given the config
> > > parameters I have), but I will _not have the wal grouping?
> >
> > The patch adds O_DIRECT (which is not being used given your configure
> > paramters), and grouped WAL writes.
> So I'll use postgresql-20050728, I'll run with it to confirm it is
> running similarly to my good run (42). If so, then I'll apply the patch
> and see what happens....
>
> This may take me a while just because I'm backed up with other
> things ....
Right.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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