Re: [HACKERS] data on devel code perf dip

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.

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