Monitoring active-active clusters
Monitoring active-active clusters in Amazon RDS for MySQL is crucial for tracking performance, replication integrity, and node synchronization. You can monitor your active-active cluster by connecting to a DB instance in the cluster, and running the following SQL command:
SELECT * FROM performance_schema.replication_group_members;
Your output should show ONLINE for the MEMBER_STATE of each DB instance, as in the
following sample output:
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| CHANNEL_NAME | MEMBER_ID | MEMBER_HOST | MEMBER_PORT | MEMBER_STATE | MEMBER_ROLE | MEMBER_VERSION | MEMBER_COMMUNICATION_STACK |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| group_replication_applier | 9854d4a2-5d7f-11ee-b8ec-0ec88c43c251 | ip-10-15-3-137 | 3306 | ONLINE | PRIMARY | 8.0.35 | MySQL |
| group_replication_applier | 9e2e9c28-5d7f-11ee-8039-0e5d58f05fef | ip-10-15-3-225 | 3306 | ONLINE | PRIMARY | 8.0.35 | MySQL |
| group_replication_applier | a6ba332d-5d7f-11ee-a025-0a5c6971197d | ip-10-15-1-83 | 3306 | ONLINE | PRIMARY | 8.0.35 | MySQL |
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
3 rows in set (0.00 sec)For information about the possible MEMBER_STATE values, see
Group Replication Server States