Horton

Don't duplicate parallel seqscan shmem sizing logic in nbtree.

Andres Freund <andres@anarazel.de>

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Commit: 90525d7b4e0fe5ebd53960cd7ef59ee11ff06516
Author: Andres Freund <andres@anarazel.de>
Date: 2019-01-15T20:19:21Z
Releases: 12.0 
Don't duplicate parallel seqscan shmem sizing logic in nbtree.

This is architecturally mildly problematic, which becomes more
pronounced with the upcoming introduction of pluggable storage.

To fix, teach heap_parallelscan_estimate() to deal with SnapshotAny
snapshots, and then use it from _bt_parallel_estimate_shared().

Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de

Files

PathChange+/−
src/backend/access/heap/heapam.c modified +8 −2
src/backend/access/nbtree/nbtsort.c modified +3 −10

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