On Fri, Feb 11, 2011 at 8:35 AM, Stephen Frost <sfr...@snowman.net> wrote: > Greg, > > * Tom Lane (t...@sss.pgh.pa.us) wrote: >> Greg Smith <g...@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.
Seeing as how this patch has not been updated, I think it's time to mark this one Returned with Feedback. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
