The server publishes monitoring messages to the topic $sys.monitor.multicast.status. These messages contain information about the status of a multicast consumer and the multicast daemon to which it is connected. This information includes when a consumer has successfully joined a multicast group and when a consumer experiences an error, such as unrecoverable loss in its multicast daemon. By monitoring multicast errors you can detect which consumers are experiencing problems, allowing you to take corrective action.
Low-level multicast statistics are published in a monitoring message to the topic $sys.monitor.multicast.stats. The statistics include information such as the number of bytes sent to a multicast group and the number of
NAKs sent by a multicast daemon. These multicast statistics can aid in troubleshooting a multicast deployment when provided to TIBCO technical support. Generally these statistics won’t have much meaning to a typical user. Multicast statistics are only published when the server’s
multicast_statistics_interval is set to a non-zero value. By default the
multicast_statistics_interval is set to zero.
See Working with Server Statistics for more information on statistics.