Hi Jony,

Please see the output of "ps -ef | grep postg" below after I stopped and started postgres:

postgres 11611 1 0 00:05 ? 00:00:00 /usr/pgsql-9.4/bin/postmaster -D /var/lib/pgsql/9.4/data
postgres 11613 11611 0 00:05 ? 00:00:00 postgres: logger process
postgres 11615 11611 0 00:05 ? 00:00:00 postgres: checkpointer process
postgres 11616 11611 0 00:05 ? 00:00:00 postgres: writer process
postgres 11617 11611 0 00:05 ? 00:00:00 postgres: wal writer process
postgres 11618 11611 0 00:05 ? 00:00:00 postgres: autovacuum launcher process
postgres 11619 11611 0 00:05 ? 00:00:00 postgres: stats collector process
postgres 11666 11611 0 00:05 ? 00:00:00 postgres: postgres labkey 127.0.0.1(43654) idle
root 11670 11520 0 00:05 pts/2 00:00:00 grep postg

Thanks,
Vahid