Are you using docker on centos ? I had problem with centos/docker/postgresql because container size was (maybe still is) limited to 20GB on that specific OS. Maybe not related, but good to know
exec su postgres -c "/usr/lib/postgresql/9.3/bin/postgres -D /var/lib/postgresql/9.3/main -c config_file=/etc/postgresql/9.3/main/postgresql.conf"
until yesterday there were no problem right now I see this in the /var/log/supervisor's directory:
2015-10-01 21:40:18 UTC HINT: The file seems accidentally left over, but it could not be removed. Please remove the file by hand and try again. 2015-10-01 21:40:20 UTC FATAL: could not remove old lock file "postmaster.pid": Permission denied
try... ls -la /var/lib/postgresql/9.3/main
The directory . should be owned by the postgres user, and it should have 700, 750, or 770 permissions. all the files in it should also be owned by postgres.
also look and see if postgres logged anything in its own system log files (/var/log/postgresql/9.3 or whatever).
