| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: enable parallel query by default? |
| Date: | 2016-02-08 21:29:50 |
| Message-ID: | 4645.1454966990@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> One of the questions I have about parallel query is whether it should
> be enabled by default. That is, should we make the default value of
> max_parallel_degree to a value higher than 0? Perhaps 1, say?
I'm not sure I'm on board with that as a releaseable default, but there
certainly would be an argument for turning it on from now to say mid
beta, so as to improve test coverage. I think we've done similar things
in the past.
I don't understand however how that doesn't break the regression tests?
Surely we've got lots of EXPLAIN queries that would change.
regards, tom lane
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