10.2.1 Operands related to connection to and disconnection from a foreign server

1) pd_hb_db_con = STARTUP | ACCESS
Specifies the timing to connect to a foreign server.
STARTUP:
Connects to a foreign server when a back-end server process is started.
When STARTUP is specified, the foreign server is connected even when there is no processing involving it. Therefore, if there is a limit on the number of foreign servers that can be connected, specify ACCESS.
ACCESS:
Connects to a foreign server only when a back-end server process requests access to the foreign server.
2) pd_hb_db_dis_con = SHUTDOWN | COMMIT
Specifies the timing to disconnect from a foreign server.
SHUTDOWN:
Disconnects from the foreign server when a back-end server process is terminated.
When SHUTDOWN is specified, the foreign server is connected even when there is no processing involving it. Therefore, if there is a limit on the number of foreign servers that can be connected, specify COMMIT.
COMMIT:
Disconnects from the foreign server immediately after COMMIT is issued to the foreign server.