Hi,
I'm working on adding information about prefetching for scans [1], which
includes BitmapHeapScan. I realized the instrumentation added by this
thread may not be quite right, resulting in missing instrumentation for
non-parallel-aware scans in a parallel query.
A better description / explanation of the issue is posted here [2]. I've
posted a proposed fix in the following message [3], in a patch:
v8-0002-Show-Bitmap-Heap-Scan-stats-for-non-parallel-awar.patch
I wonder if someone from this thread could review my analysis, and
confirm this is not intentional. I don't see it discussed in the thread,
so I assume no one noticed this behavior. I'd also appreciate a review
of the proposed fix, or suggestions for alternative fixes.
regards
[1]
https://www.postgresql.org/message-id/a177a6dd-240b-455a-8f25-aca0b1c08c6e%40vondra.me
[2]
https://www.postgresql.org/message-id/3bdbc70d-ad44-494a-8aab-868b5066fe8b%40vondra.me
[3]
https://www.postgresql.org/message-id/fce326bb-1210-4d48-8c97-bb3bca396eba%40vondra.me
--
Tomas Vondra
