MAX TSO CONNECT field (IDFORE subsystem parameter)

The IDFORE subsystem parameter determines the maximum number of users that can be identified to Db2 from TSO foreground at the same time.

Acceptable values: 1–20000
Default: 50
Update: option 19 on panel DSNTIPB
DSNZPxxx: DSN6SYSP IDFORE

Count each of the following items as a separate user:

  • Each TSO foreground user that is executing a DSN command.
  • Each TSO foreground user that is connected to Db2 through the CAF or RRSAF. This can include QMF users who are running in TSO foreground or user-written CAF or RRSAF applications running in TSO foreground.

When the number of TSO users who are attempting to access Db2 exceeds the number you specify, excess connection requests are rejected. No Db2 subsystem parameter controls the maximum concurrent connections for IMS and CICS®. You can control those limits by using IMS and CICS facilities. For the CICS attachment, the maximum number of connections to Db2 by using the resource control table (RCT) TYPE=INIT THRDMAX value.