I noticed while doing some tests that the checkpointer process does not
recover very nicely after a backend crashes under postmaster -T (after
all processes have been kill -CONTd, of course, and postmaster told to
shutdown via Ctrl-C on its console). For some reason it seems to get
stuck on a loop doing sleep(0.5s) In other case I caught it trying to
do a checkpoint, but it was progressing a single page each time and then
sleeping. In that condition, the checkpoint took a very long time to
finish.
Pressing Ctrl-C in the postmaster console at that point does not have
any effect.
--
Álvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>