Add minimal sleep to stats isolation test functions. The functions test_stat_func() and test_stat_func2() had empty function bodies, so that they took very little time to run. This made it possible that on machines with relatively low timer resolution the functions could return before the clock advanced, making the test fail (as seen on buildfarm members fruitcrow and hamerkop).
To avoid that, pg_sleep for 10us during the functions. As far as we can tell, all current hardware has clock resolution much less than that. (The current implementation of pg_sleep will round it up to 1ms anyway, but someday that might get improved.) Author: Michael Banck <[email protected]> Reviewed-by: Tom Lane <[email protected]> Discussion: https://postgr.es/m/[email protected] Backpatch-through: 15 Branch ------ REL_16_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/21ada43a6105bee3093d636d2ba2afc71bebe5a1 Modified Files -------------- src/test/isolation/specs/stats.spec | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
