Recent Channel Initiator Status workspace (z/OS systems only)

The Recent Channel Initiator Status workspace is available on z/OS® systems only.

The Recent Channel Initiator Status workspace provides you with information about channel connection states. It provides statistics collected over several sampling intervals, which you can use to view trends in the data. Use this view to monitor adapter subtask and dispatcher activity, detect errors in the communications system that maybe adversely affecting processing capacity.

The IBM® MQ Monitoring agent also provides current and historical versions of this workspace.

Predefined views

The Recent Channel Initiator Status workspace includes the following predefined views:

  • Recent Channel Initiator Status This view contains a table that provides you with statistics related to the state of channel connections, including the number of connections with the following statuses: current, maximum, active, starting, stopping, and retrying. It provides statistics collected over several sampling intervals, which you can use to view trends in the data. Use this view to identify problems occurring in adapter subtask and dispatcher activity. You can also perform the following tasks to detect errors in the communications system that might be adversely affecting processing capacity:
    • Compare the number of adapter subtasks that are currently active to the number of adapter subtasks requested in the channel initiator parameters. If the numbers differ, this indicates that some adapter subtasks have failed and not restarted, reducing processing capacity.
    • Compare the number of dispatchers that are currently active to the number of dispatchers requested in the channel initiator parameters. If the numbers differ, this indicates that some dispatchers have failed and not restarted. The number of current TCP/IP and LU 6.2 channels allowed will be reduced proportionately adversely affecting performance, and other processing might be affected, also reducing processing capacity.
    • Compare the relationships between the numbers of channel connections that are current, active, maximum, starting, stopping, and retrying.
    • Review the status of the channel initiator, TCP/IP listener, TCP/IP group listener, LU 6.2 listener, and LU 6.2 group listener.

    On z/OS systems, TCP/IP listeners can be started many times with different combinations of port number and address. If this occurs, the TCP/IP Listener Active and Port Number columns in this workspace are set to the last set of TCP/IP listener information provided by IBM MQ (WebSphere® MQ).

  • Channel Initiator Status Summary This view shows selected columns from the Channel Initiator Status view in the form of a bar chart to provide a visual comparison of data.
  • TCP/IP Started Listeners This view provides you with data about all started TCP/IP listeners, including the IP address, port number, and the inbound disposition of messages received by the listener.

For more information on the attributes listed in the tables of this workspace, see Channel Initiator Status attribute group.

Predefined links

No other workspaces can be linked to from the Recent Channel Initiator Status workspace.