On 2014-10-01 01:44:04 -0700, Peter Geoghegan wrote:
> In the hope of unblocking things, I have created this Wiki page, which
> details the advantages and disadvantages of all 3 approaches that have
> been discussed, as suggested by myself and others:
>
> https://wiki.postgresql.org/wiki/Value_locking
Good.
> I actually think that we're only in disagreement on the extent to
> which the stated advantages and disadvantages are useful or harmful.
> So I think that at the moment this description is a reasonably
> balanced handling of the issues. Please add any points that I missed.
>
> This is by no means complete yet. There is pretty limited handling of
> what I call "#3. "Promise" index tuples", because there was no
> prototype version of that design, and there are many open questions
> about how it would be implemented relative to the other 2 approaches.
> Perhaps Andres or Simon would care to improve it. I think I've done a
> better job of describing #2, Heikki's design - hardly surprising,
> since there was a prototype that we discussed at length - but I'd
> appreciate it if other people would make sure that I have everything
> right there. This is hopefully the beginning of working the issues
> out. I have of course also described my own proposed design alongside
> the others.
FWIW, Heikki's approach isn't what I'd have choosen, but it's something
I can live with.
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services