Another round of pg win32 speedups

This is actually a bit old news, but I've been out of town.

About a week ago, we got a patch from Qingqing Zhou (and changed around in several different steps my me and Tom Lane) applied to PostgreSQL 8.1 that changes the way win32 polls for the "fake signals" used to emulate Unix behaviour and eliminates a kernel call in a very active codepath. The end result of this: Very nice speedups on Windows. In some isolated test-cases up to 40%25!!! In general cases, it's going to be much less than that of course, but it is still a significan speedup. It appears especially efficient in scenarios with lots of concurrent access, bringing win32 performance much closer to what we have on Linux.

Way to go Qingqing, and thanks also to Merlin and Andrew for quick testing work.

My own update from the Japan trip coming up in a bit...


I speak at and organize conferences around Open Source in general and PostgreSQL in particular.


Stockholm PUG 2016/5
Oct 25, 2016
Stockholm, Sweden
PGConf.EU 2016
Nov 1-4, 2016
Tallinn, Estonia
Berlin PUG
Nov 17, 2016
Berlin, Germany
PGConf.Asia 2016
Dec 2-3, 2016
Tokyo, Japan
FOSDEM + PGDay 2017
Feb 2-4, 2017
Brussels, Belgium


Postgres Vision 2016
Oct 11-13, 2016
San Francisco, USA
Postgres Open
Sep 13-16, 2016
Dallas, USA
Stockholm PUG 2016/4
Aug 31, 2016
Stockholm, Sweden
PG Day'16 Russia
Jul 6-8, 2016
St Petersburg, Russia
PGDay UK 2016
Jul 05, 2016
London, UK
More past conferences