Greg,
* Tom Lane (tgl@sss.pgh.pa.us) wrote:
> Greg Smith <greg@2ndquadrant.com> writes:
> > Poking around a bit more, I just discovered another possible approach is
> > to use erand48 instead of rand in pgbench, which is either provided by
> > the OS or emulated in src/port/erand48.c That's way more resolution
> > than needed here, given that 2^48 pgbench accounts would be a scale of
> > 2.8M, which makes for a database of about 42 petabytes.
>
> I think that might be a good idea --- it'd reduce the cross-platform
> variability of the results quite a bit, I suspect. random() is not
> to be trusted everywhere, but I think erand48 is pretty much the same
> wherever it exists at all (and src/port/ provides it elsewhere).
Works for me. Greg, will you be able to work on this change? If not, I
might be able to.
Thanks,
Stephen