MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
Use the Perfomance Schema tables to monitor Group Replication, assuming that the Performance Schema is enabled. Group Replication adds the following tables:
These Perfomance Schema replication tables also show information about Group Replication:
performance_schema.replication_connection_status
shows information regarding Group Replication, for example the
transactions that have been received from the group and queued
in the applier queue (the relay log).
performance_schema.replication_applier_status
shows the state of the Group Replication related channels and
threads If there are many different worker threads applying
transactions, then the worker tables can also be used to monitor
what each worker thread is doing.
The replication channels created by the Group Replication plugin are named:
group_replication_recovery - This channel is
used for the replication changes that are related to the
distributed recovery phase.
group_replication_applier - This channel is
used for the incoming changes from the group. This is the
channel used to apply transactions coming directly from the
group.
The following sections describe how to interpret the information available.