On Tue, Mar 17, 2015 at 11:27 AM, Fabien COELHO <coelho@cri.ensmp.fr> wrote:
> The fprintf we are talking about occurs at most once per pgbench
> transaction, possibly much less when aggregation is activated, and this
> transaction involves networks exchanges and possibly disk writes on the
> server.
random() was occurring four times per transaction rather than once,
but OTOH I think fprintf() is probably a much heavier-weight
operation. The way to know if there's a real problem here is to test
it, but I'd be pretty surprised if there isn't.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
