Re: Fix Heap Blocks accumulation for Parallel Bitmap Heap Scan

From: Melanie Plageman <melanieplageman(at)gmail(dot)com>
To: Lukas Fittl <lukas(at)fittl(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Tomas Vondra <tomas(at)vondra(dot)me>, Andres Freund <andres(at)anarazel(dot)de>, David Rowley <dgrowley(at)gmail(dot)com>
Subject: Re: Fix Heap Blocks accumulation for Parallel Bitmap Heap Scan
Date: 2026-04-05 19:08:03
Message-ID: CAAKRu_YvqAVY05AFqZCaAXawXds5Syn1AmEhaBhMOaBe3x+3og@mail.gmail.com
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On Sun, Apr 5, 2026 at 2:52 PM Lukas Fittl <lukas(at)fittl(dot)com> wrote:
>
> Parallel Bitmap Heap Scans were missing such handling in
> show_tidbitmap_info, causing the information shown on the plan to only
> reflect the Heap Blocks of the leader, not that of the parallel
> workers. I think this is inconsistent, and should be fixed.

I think this was intentional. See David's comment here [1].

- Melanie

[1] https://www.postgresql.org/message-id/CAApHDvqFtd-9DYH70sbjD7iB-Eq-xSip1LPr%3DnayfpPd1pkZVw%40mail.gmail.com

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