[yz@localhost ~]$ pg_ctl -D /home/yz/pg_data/ -l ~/logfile start
waiting for server to start.... done
server started
[yz@localhost ~]$ ps ux | grep postgres
yz       18221  0.0  0.1 275748 13360 ?        Ss   10:37   0:00 /home/yz/pg_bin/bin/postgres -D /home/yz/pg_data
yz       18223  0.0  0.0 275864  2660 ?        Ss   10:37   0:00 postgres: checkpointer
yz       18224  0.0  0.0 275880  2380 ?        Ss   10:37   0:00 postgres: background writer
yz       18225  0.0  0.0 275748  5288 ?        Ss   10:37   0:00 postgres: walwriter
yz       18226  0.0  0.0 276432  2312 ?        Ss   10:37   0:00 postgres: autovacuum launcher
yz       18227  0.0  0.0 130520  1208 ?        Ss   10:37   0:00 postgres: stats collector
yz       18228  0.0  0.0 276304  1848 ?        Ss   10:37   0:00 postgres: logical replication launcher