On Fri, Dec 04, 2009 at 02:05:28PM -0500, Tom Lane wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > So, do we look for another way to provide the functionality besides
> > having a GUC, or is the functionality itself bad?
>
> I don't think we want random Perl code running inside the postmaster,
> no matter what the API to cause it is. I might hold my nose for "on
> load" code if it can only run in backends, though I still say that
> it's a badly designed concept because of the uncertainty about who
> will run what when.
Robert's comparison with mod_perl is very apt. Preloading code gives
dramatic performance gains in production situations where there's a
significant codebase and connections are frequent.
The docs for plperl.on_perl_init could include a section relating to
it's use with shared_preload_libraries. That could document any issues
and caveats you feel are important.
Tim.