Re: New to PostgreSQL, performance considerations

Tom Lane wrote:
> Alvaro Herrera <alvherre@commandprompt.com> writes:
> > While skimming over the pgbench source it has looked to me like it's
> > necessary to pass the -s switch (scale factor) to both the
> > initialization (-i) and the subsequent (non -i) runs.
>
> No, it's not supposed to be, and I've never found it needed in practice.
> The code seems able to pull the scale out of the database (I forget how
> it figures it out exactly).

pgbench is designed to be a general benchmark, meanining it exercises
all parts of the system.  I am thinking just reexecuting a single SELECT
over and over again would be a better test of the CPU optimizations.

--
  Bruce Momjian   bruce@momjian.us
  EnterpriseDB    http://www.enterprisedb.com

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