Stefan Schwarzer <stefan.schwarzer@grid.unep.ch> writes:
> When I start the postmaster it seems ok. But there is no process
> running.
Then it didn't really start successfully. (Unless you use the -w
option, "pg_ctl start" just launches the postmaster --- it doesn't
wait around to see what happens.) You need to look into the log
file to see what the problem was.
regards, tom lane