Tom Lane 75be66464c Invent min_parallel_relation_size GUC to replace a hard-wired constant. ... The main point of doing this is to allow the cutoff to be set very small, even zero, to allow parallel-query behavior to be tested on relatively small tables such as we typically use in the regression tests. But it might be of use to users too. The number-of-workers scaling behavior in create_plain_partial_paths() is pretty ad-hoc and subject to change, so we won't expose anything about that, but the notion of not considering parallel query at all for tables below size X seems reasonably stable. Amit Kapila, per a suggestion from me Discussion: <17170.1465830165@sss.pgh.pa.us>		2016-06-16 13:47:20 -04:00
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src	Invent min_parallel_relation_size GUC to replace a hard-wired constant.	2016-06-16 13:47:20 -04:00
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