You guys call this "simplification"? You're out of your minds.
This proposal is ridiculously complicated, and yet it still fails
even to consider adjusting non-numeric parameters. And what about
things that require more than a trivial arithmetic expression to
compute? It's not hard at all to imagine wanting log, sqrt, etc.
We do not need to put computational capability into GUC. Any
computations needed to determine a parameter setting should be done
by a wizard.
+1 (save the comment speculating about anyone's location relative to
their mind ;)
Additionally, obvious as it may be, there's nothing stopping anyone
from developing a tool to generate the configuration file from a
more "interesting" source. Whether that's XML or some DSL that
supports computations, doesn't matter. I would think if such a tool
showed dramatic merit it would provoke another discussion about core
integration, but ISTM that leaving it dead simple is best.
[mm, hook into the postgres startup script, shouldn't be that hard to
administer..]
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