Re: PATCH: pgbench - merging transaction logs

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
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