"Thomas F. O'Connell" <tf@xxxxxxxxxxxxxx> writes: > I'm curious. For 7.4.x, does the database require a restart for the > change to take effect? I'm aware of a few production installations > where the OS changed, but postgres time functions didn't take hold. Yes, probably. On those systems you will likely also find cron and other time-sensitive subsystems in need of a restart ... regards, tom lane