On Thu, Dec 25, 2014 at 09:14:36PM +0100, Andres Freund wrote:
> My guess is that a checkpoint happened at that time. Maybe it'd be a
> good idea to make pg_regress start postgres with log_checkpoints
> enabled? My guess is that we'd find horrendous 'sync' times.
+1, independent of $SUBJECT. How about log_autovacuum_min_duration=0, too?