[postgres@bogon ~]$ ps ux | grep postgres
postgres  67582  0.0  0.2 272596 13544 ?        Ss   16:53   0:00 /opt/postgresql/bin/postgres -D /opt/pgdata
……
postgres  67590  0.0  0.0 124964  2076 pts/0    S+   16:53   0:00 psql tpch1s
postgres  67591  1.5  0.2 275860 11820 ?        Rs   16:53   0:14 postgres: postgres tpch1s [local] SELECT