On 2014-11-12 10:13:18 -0500, Robert Haas wrote:
> On Tue, Nov 11, 2014 at 4:27 AM, Andres Freund <and...@2ndquadrant.com> wrote:
> > The more important thing here is that I see little chance of this
> > getting in before Heikki's larger rework of the wal format gets
> > in. Since that'll change everything around anyay I'm unsure how much
> > point there is to iterate till that's done. I know that sucks, but I
> > don't see much of an alternative.
> Why not do this first?  Heikki's patch seems quite far from being
> ready to commit at this point - it significantly increases WAL volume
> and reduces performance.  Heikki may well be able to fix that, but I
> don't know that it's a good idea to make everyone else wait while he
> does.

Because it imo builds the infrastructure to do the compression more
sanely. I.e. provide proper space to store information about the
compressedness of the blocks and such.


Andres Freund

 Andres Freund                     http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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