Alvaro Herrera 15a8f8caad Fix IndexOnlyScan counter for heap fetches in parallel mode ...

The HeapFetches counter was using a simple value in IndexOnlyScanState,
which fails to propagate values from parallel workers; so the counts are
wrong when IndexOnlyScan runs in parallel.  Move it to Instrumentation,
like all the other counters.

While at it, change INSERT ON CONFLICT conflicting tuple counter to use
the new ntuples2 instead of nfiltered2, which is a blatant misuse.

Discussion: https://postgr.es/m/20180409215851.idwc75ct2bzi6tea@alvherre.pgsql

2018-04-10 15:56:15 -03:00

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