Try again to fix 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.
Commit 778e78ae9fa51e58f41cbdc72b
Try again to fix 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.
Commit 778e78ae9fa51e58f41cbdc72b
