Channel Initiator Status workspace (z/OS systems only)
The Channel Initiator Status workspace is available on z/OS® systems only.
The Channel Initiator Status workspace provides you with information about channel connection states. Use this view to monitor adapter subtask and dispatcher activity, and detect errors in the communications system that might be adversely affecting processing capacity.
Channel Initiator Status information can be stored to allow the viewing of historic data collected over a long period of time (such as the lifetime of the system). For this data to be stored, historical collection must be enabled in History Collection Configuration.
Predefined views
The Channel Initiator Status workspace includes the following predefined views:
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. 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 sub-tasks that are currently active to the number of adapter sub-tasks defined in the channel initiator parameters. If the numbers differ, this indicates that some adapter sub-tasks have failed and not restarted, reducing processing capacity.
- Compare the number of dispatchers that are currently active to the number of dispatchers defined 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 used will be reduced proportionately, adversely affecting performance and reducing processing capacity.
- Compare the relationships between the numbers of channel connections that are current and active, and the maximum number of channels that can be active simultaneously.
- 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, many TCP/IP listeners can be used simultaneously with different combinations of port number and address. Under these circumstances, the TCP/IP Listener Active and Port Number columns in this view correspond to the last set of TCP/IP listener information provided by 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 Detail attributes (z/OS systems only).
Predefined links
No other workspaces can be linked to from the Channel Initiator Status workspace.