Horton

Back-port fix for accumulation of parallel worker instrumentation.

Robert Haas <rhaas@postgresql.org>

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Commit: 2157a61b5aa3805a9e0fb11fa2fd4da9ca54234c
Author: Robert Haas <rhaas@postgresql.org>
Date: 2018-01-04T17:46:00Z
Releases: 9.6.7 
Back-port fix for accumulation of parallel worker instrumentation.

When a Gather or Gather Merge node is started and stopped multiple
times, accumulate instrumentation data only once, at the end, instead
of after each execution, to avoid recording inflated totals.

This is a back-port of commit 8526bcb2df76d5171b4f4d6dc7a97560a73a5eff
by Amit Kapila.

Discussion: http://postgr.es/m/20171127175631.GA405@depesz.com
Discussion: http://postgr.es/m/CAA4eK1KT3BYj50qWhK5qBF=LDzQCoUVSFZjcK3mHoJJeWA+fNA@mail.gmail.com

Files

PathChange+/−
src/backend/executor/execParallel.c modified +10 −10
src/test/regress/expected/select_parallel.out modified +44 −0
src/test/regress/sql/select_parallel.sql modified +28 −0

Discussion