On Sat, Apr 20, 2013 at 10:02 PM, Bruce Momjian <bruce@momjian.us> wrote:
> I will be working on polishing them for the next ten days, so any
> feedback, patches, or commits are welcome. I still need to add lots of
> SGML markup.
I've noticed a few things:
* Allow heap-only tuple updates on system tables (Andres Freund)
Didn't Andres just fix a bug wherein HOT updates usually wouldn't
occur on system tables following the commit of the foreign key locks
patch? While HOT's development occurred at a time before I followed
pgsql-hackers, I seem to recall someone telling me that Tom insisted
upon HOT working with system catalogs specifically because if it
wasn't good enough to work there, it wasn't good enough to work
anywhere, or something like that. I guess the source of the confusion
is specifically that at one point HOT really didn't work with system
catalogs. But, if I'm not mistaken, never in a released version.
* Improve grouping of sessions waiting for commit_delay (Peter Geoghegan)
I think this should be under "General Performance". It's definitely a
performance feature.
--
Peter Geoghegan