On 3 June 2015 at 20:04, Andres Freund <and...@anarazel.de> wrote: > On 2015-06-03 18:54:24 +0800, Craig Ringer wrote: > > OK, here we go. > > Hm. Wouldn't random sampling be better than what you do? If your queries > have a pattern to them (e.g. you always issue the same 10 queries in > succession), this will possibly only show a subset of the queries. > > I think a formulation in fraction (i.e. a float between 0 and 1) will > also be easier to understand.
Could be, yeah. I was thinking about the cost of generating a random each time, but it's going to vanish in the noise compared to the rest of the costs in query execution. --- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
