Zhang Mingli <[email protected]> writes: >> On Thu, Feb 12, 2026 at 7:19 AM Yasir <[email protected]> wrote: >>> This produced so many regression failures. I'm wondering, are such failures >>> typical/expected when altering the default block size?
> Our experience shows that when changing the block size, most of the > regression test differences are expected — they often reflect output > variations (like buffer counts, cost estimates, or physical storage details) > rather than functional bugs. > That said, it really needs to be examined case by case. Indeed. There is relevant documentation here: https://www.postgresql.org/docs/current/regress-evaluation.html (Some of that looks a bit out of date, ie differences we don't really expect to happen anymore. But plan changes and row-ordering changes are definitely expected if you change any parameter that affects planner cost estimates.) regards, tom lane
