Re: [COMMITTERS] pgsql-server/ oc/src/sgml/runtime.sgml rc/back ...

Tom Lane wrote:
> Log message:
>     Finish implementation of hashed aggregation.  Add enable_hashagg GUC
>     parameter to allow it to be forced off for comparison purposes.
>     Add ORDER BY clauses to a bunch of regression test queries that will
>     otherwise produce randomly-ordered output in the new regime.

Tom, do we really want to add a GUC that is used just for comparison of
performance?  I know we have the seqscan on/off, but there are valid
reasons to do that.  Do you think there will be cases where it will
faster to have this hash setting off?

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