 application_name | sent_delta | write_delta | flush_delta | replay_delta
------------------+------------+-------------+-------------+--------------
 walreceiver      |          1 |           1 |           1 |            1
 walreceiver      |          1 |           1 |           1 |            1
 phys-standby2    |          0 |           0 |           0 |            0