Re: COPY with hints, rebirth

Kevin Grittner <kevin.grittner@wicourts.gov>

From: "Kevin Grittner" <Kevin.Grittner@wicourts.gov>
To: "Simon Riggs" <simon@2ndQuadrant.com>, "Noah Misch" <noah@leadboat.com>
Cc: "Heikki Linnakangas" <heikki.linnakangas@enterprisedb.com>, "PostgreSQL-development" <pgsql-hackers@postgresql.org>
Date: 2012-03-02T23:15:47Z
Lists: pgsql-hackers
Simon Riggs <simon@2ndQuadrant.com> wrote:
 
> I like Marti's idea. At present, making his idea work could easily
> mean checksums sink, so not sure whether to attempt to make that
> work in detail.
 
For my part, improving bulk load performance and TRUNCATE
transactional semantics would trump checksums.  If we have to defer
one or the other to a later release, I would prefer that we bump
checksums.
 
While I understand the desire for checksums, and understand others
have had situations where they would have helped, so far I have yet
to run into a situation where I feel they would have helped me.  The
hint bit and freeze issues require ongoing attention and have real
performance consequences on a regular basis.  And closing the window
for odd transactional semantics on TRUNCATE versus DELETE of all
rows in a table would be one less thing to worry about, in my world.
 
-Kevin