Tom Lane wrote:
If you have background tasks doing ANALYZEs then this explanation seems
plausible enough. I'm willing to accept it anyway ...
Yup, there are such tasks. I could dig through logs to try to confirm
or reject it; but I think it's reasonably likely that this happened.
Basically, data gets added to that table as it becomes ready from other
systems, and after each batch a vacuum analyze is run.
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