On 2022-Oct-11, Tom Lane wrote:
> Are there any tables in this query where extremal values of the join
> key are likely to be in recently-added or recently-dead rows? Does
> VACUUM'ing on the primary help?
I remember having an hypothesis, upon getting a report of this exact
problem on a customer system once, that it could be due to killtuple not
propagating to standbys except by FPIs. I do not remember if we proved
that true or not. I do not remember observing that tables were being
read, however.
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Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/
