On Sun, Mar 12, 2017 at 3:05 PM, Peter Geoghegan <pg@bowt.ie> wrote:
> I attach my V9 of the patch. I came up some stuff for the design of
> resource management that I think meets every design goal that we have
> for shared/unified BufFiles:
Commit 2609e91fc broke the parallel CREATE INDEX cost model. I should
now pass -1 as the index block argument to compute_parallel_worker(),
just as all callers that aren't parallel index scan do after that
commit. This issue caused V9 to never choose parallel CREATE INDEX
within nbtsort.c. There was also a small amount of bitrot.
Attached V10 fixes this regression. I also couldn't resist adding a
few new assertions that I thought were worth having to buffile.c, plus
dedicated wait events for parallel tuplesort. And, I fixed a silly bug
added in V9 around where worker_wait() should occur.
--
Peter Geoghegan
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