本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 監控主動-主動叢集
<a name="mysql-active-active-clusters-monitoring"></a>

在 Amazon RDS for MySQL 中監控主動-主動叢集對於追蹤效能、複寫完整性和節點同步至關重要。您可以連線至叢集中的資料庫執行個體，並執行下列 SQL 命令，以監控主動-主動叢集：

```
SELECT * FROM performance_schema.replication_group_members;
```

您的輸出針對每個資料庫的 `MEMBER_STATE` 之執行個體應會顯示 `ONLINE`，如下列範例輸出所示：

```
+---------------------------+--------------------------------------+----------------+-------------+--------------+-------------+----------------+----------------------------+
| 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)
```

如需可能 `MEMBER_STATE` 值的相關資訊，請參閱 MySQL 文件中的[群組複寫伺服器狀態](https://dev.mysql.com/doc/refman/8.0/en/group-replication-server-states.html)。