Fwd: 2 process postgres -D for one instance

Forwarding to pgsql-general list.

---------- Forwarded message ----------
From: francis cherat <renaultf11(at)hotmail(dot)com>
Date: Fri, Aug 11, 2017 at 7:36 PM
Subject: 2 process postgres -D for one instance
To: "pgadmin-support(at)lists(dot)postgresql(dot)org" <
pgadmin-support(at)lists(dot)postgresql(dot)org>

Hi,

some time whe have 2 process postgres for 1 instance like this

exppgs 17769 1 0 01:06 ? 00:01:04 /usr/pgsql-9.3/bin/postgres
-D /bases/postgresql/scl/data -i -p 5450 -h bd-sillage.info.xxxx
exppgs 39922 17769 0 15:39 ? 00:00:00 /usr/pgsql-9.3/bin/postgres
-D /bases/postgresql/scl/data -i -p 5450 -h bd-sillage.info.xxxx

is it an expected behavior ?

Regards

Francis