Re: pgbench - implement strict TPC-B benchmark

> On Wed, Aug 28, 2019 at 7:37 AM Fabien COELHO <coelho@cri.ensmp.fr> wrote:
>
> > While doing benchmarking using different tools, including pgbench, I found it
> > useful as a temporary hack to add copy freeze and maintenance_work_mem options
> > (the last one not as an env variable, just as a set before, although not sure
> > if it's a best idea). Is it similar to what you were talking about?
>
> About this patch:
>
> Concerning the --maintenance... option, ISTM that there could rather be a
> generic way to provide "set" settings, not a specific option for a
> specific parameter with a specific unit. Moreover, ISTM that it only needs
> to be set once on a connection, not per command. I'd suggest something
> like:
>
>    --connection-initialization '...'
>
> That would be issue when a connection is started, for any query, then the
> effect would be achieved with:
>
>    pgbench --conn…-init… "SET maintenance_work_main TO '12MB'" ...
>
> The --help does not say that the option expects a parameter.
>
> Also, in you patch it is a initialization option, but the code does not
> check for that.
>
> Concerning the freeze option:
>
> It is also a initialization-specific option that should be checked for
> that.
>
> The option does not make sense if
>
> The alternative queries could be managed simply without intermediate
> variables.
>
> Pgbench documentation is not updated.
>
> There are no tests.
>
> This patch should be submitted in its own thread to help manage it in the
> CF app.

Thanks, that was a pretty deep answer for what was supposed to be just an
alignment question :) But sure, I can prepare a proper version and post it
separately.