On Sat, Feb 12, 2011 at 03:42:17PM -0600, Kevin Grittner wrote:
> In two hours of testing with a 90GB production database, the copy
> patch on top of HEAD ran 0.6% faster than HEAD for pg_dumpall
> (generating identical output files), but feeding that in to and
> empty cluster with psql ran 8.4% faster with the patch than without!
> I'm going to repeat that latter with more attention to whether
> everything made it in OK. (That's not as trivial to check as the
> dump phase.)
>
> Do you see any reason that COPY FROM should be significantly
> *faster* with the patch?
No. Up to, say, 0.5% wouldn't be too surprising, but 8.4% is surprising. What
is the uncertainty of that figure?
> Are there any particular things I should
> be checking for problems?
Nothing comes to mind.
Thanks,
nm