Re: [HACKERS] Core team statement on replication in PostgreSQL

Alvaro Herrera wrote:
> Bruce Momjian wrote:
> > Alvaro Herrera wrote:
> > > Bruce Momjian wrote:
> > >
> > > > Added to TODO:
> > > >
> > > > o Reduce PITR WAL file size by removing full page writes and
> > > > by removing trailing bytes to improve compression
> > >
> > > If we remove full page writes, how does hint bit setting get propagated
> > > to the slave?
> >
> > We would remove full page writes that are needed for crash recovery, but
> > perhaps keep other full pages.
>
> How do you tell which is which?

The WAL format would have to be modified to indicate which entries can
be discarded.

--
Bruce Momjian <bruce@momjian.us>

http://momjian.us

EnterpriseDB

http://enterprisedb.com

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