y39chen <yan-jack(dot)chen(at)nokia(dot)com> writes:
> We encounter one problem that PostgreSQL walsender process doesn't exist
> after "pg_ctl stop -m fast".
> Uses PostgreSQL 9.6.2
There was a fix in 9.6.4 that's at least related to this problem.
It would be interesting to see if you can still reproduce it on
current 9.6.
regards, tom lane