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Target customers: ApsaraDB RDS for PostgreSQL users. Features released: In the High-availability Edition with standard SSDs or ESSDs, ApsaraDB RDS for PostgreSQL allows you to temporarily disable the primary/secondary switchover function in the following scenarios: 1. Logical replication is enabled. You do not want slots to be lost as a result of primary/secondary switchovers because slot losses cause logical replication exceptions. 2. Slotting is enabled to incrementally replicate or migrate data by using Data Transmission Service (DTS). You do not want slots to be lost as a result of primary/secondary switchovers because slot losses cause data replication or migration exceptions. 3. There are ongoing large tasks, which may mislead the system into considering the primary instance is abnormal and cause the system to initiate primary/secondary switchovers. After this function is disabled, the system does not switch over services from the primary to secondary instances even if it detects exceptions in the primary instance. This helps ensure system stability and service availability.