On Fri, 2007-11-30 at 13:07 -0500, Tom Lane wrote:
> FWIW, I tend to agree with the folks who think Bruce trimmed too much
> this time. But the release notes are, and always have been, intended to
> boil the CVS history down to something useful by eliminating irrelevant
> detail.
OK, so given everything mentioned on this thread, there are three items
that are user noticeable and so don't fall into the category of
irrelevant detail:
- Merge Join performance has been substantially improved when low number
of duplicate join keys exist on the outer side of the join (Simon, Greg)
- Large I/O reduction during recovery when full_page_writes = on
(Heikki)
- WAL file switch performance has been improved. Recovery startup now
refers to the last checkpoint time, which may be anything up to the
checkpoint_timeout interval before a database crash. (Simon, Tom)
The last one seems important to me, but I can see that might be TMI for
some people, though I feel we should document it somewhere.
-- Simon Riggs 2ndQuadrant http://www.2ndQuadrant.com