Re: New GUC to sample log queries

Thanks!  I pushed this with two changes -- one was to reword the docs a
bit more, and the other was to compute in_sample only if it's going to
be used (when exceeded is true).  I hope this won't upset any compilers ...

I wonder if there's any sensible way to verify the behavior in an
automated fashion.  Who know what marvels we'd discover about the
reliability/uniformity of random() across platforms.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services