On Wed, Aug 3, 2022 at 1:47 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > Again, this seems to me to be breaking the test's real-world applicability > for a (false?) sense of stability.
I agree. A lot of the VACUUM test flappiness issues we've had to deal with in the past now seem like problems with VACUUM itself, the test's design, or both. For example, why should we get a totally different pg_class.reltuples because we couldn't get a cleanup lock on some page? Why not just make sure to give the same answer either way, which happens to be the most useful behavior to the user? That way the test isn't just targeting implementation details. -- Peter Geoghegan
