The replication_group_members  table has these columns: 

• CHANNEL_NAME 

Name of the Group Replication channel. 

• MEMBER_ID 

The member server UUID. This has a different value for each member in the group. This also serves as a key because it is unique to each member. 

• MEMBER_HOST 

Network address of this member (host name or IP address). Retrieved from the member’s hostname variable. This is the address which clients connect to, unlike the group_replication_local_address which is used for internal group communication. 

• MEMBER_PORT 

Port on which the server is listening. Retrieved from the member’s port  variable. 

• MEMBER_STATE 

Current state of this member; can be any one of the following: 

• ONLINE : The member is in a fully functioning state. 

• RECOVERING : The server has joined a group from which it is retrieving data. 

• OFFLINE : The group replication plugin is installed but has not been started. 

• ERROR : The member has encountered an error, either during applying transactions or during the recovery phase, and is not participating in the group’s transactions. 

• UNREACHABLE : The failure detection process suspects that this member cannot be contacted, because the group messages have timed out. 

See Section 18.4.2, “Group Replication Server States” . 

• MEMBER_ROLE 

Role of the member in the group, either PRIMARY  or SECONDARY . 

• MEMBER_VERSION 

MySQL version of the member. 

The replication_group_members  table has no indexes. 

TRUNCATE TABLE  is not permitted for the replication_group_members  table. 

## 27.12.11.12 The replication_group_member_stats Table 

This table shows statistical information for replication group members. It is populated only when Group Replication is running. 

The replication_group_member_stats  table has these columns: 

• CHANNEL_NAME 

