Controlling OTMA input messages

Use the OTMA descriptor, the /START TMEMBER INPUT command, or a client-bid protocol message from an OTMA member to set the maximum transaction instance block (TIB) or maximum active input message count for an OTMA member.

The OTMA descriptor can be used to establish the initial maximum active input message count for an OTMA member. The client-bid protocol message can under-ride the value that is set by the OTMA descriptor, but not override it. The /START TMEMBER INPUT command can always be used to override the value that is specified by the OTMA descriptor or client-bid protocol message. If the value is not specified by any of these methods, the system default of 5000 TIBs is used.

OTMA monitors the growth of the active input messages from members. A warning message DFS1988W is sent to the console to indicate that a certain percentage of the TIB limit for the member has been reached. The message is sent when the member reaches 80% of the TIB limit and then for each additional 5% thereafter. When the maximum limit is reached, an error message DFS1989E is sent to the console. Any subsequent OTMA input messages are rejected with a new OTMA sense code X'30'.

Use the /DISPLAY TMEMBER or /DIS OTMA command to display the active input message count for an OTMA member.

To activate global flood control to suppress new OTMA input transactions, complete one of the following tasks:
  • Specify the global flood limit value INPT for the DFSOTMA member in the OTMA client descriptor for all the OTMA members.
  • Issue the IMS command /START TMEMBER ALL INPUT ####.