Help Center/ Relational Database Service_RDS for SQL Server/ User Guide/ Events
Updated on 2026-09-11 GMT+08:00
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Events

Scenarios

The system regularly checks your instance for risky versions or underlying software/hardware failures to help maintain its availability. If the risk cannot be automatically mitigated, the system generates an event for the instance and reports it on the console.

You can view the instance ID, event type, event cause, event status, and service impact of each event and also modify the event execution time.

Event Types

To view the following events, submit a service ticket.

Table 1 Supported events

Event Type

Risk Level

Event Cause

High CPU load

Major

The CPU or memory usage of your instance has reached the threshold. You must change the instance class.

The default CPU threshold is 90% and the default memory threshold is 95%.

High disk load

Major

The disk IOPS or bandwidth of your instance has reached the threshold. You must change the storage type or expand the storage capacity.

For details about the disk IOPS and bandwidth thresholds, see "Disk IOPS calculation formula" and "Disk throughput calculation formula" in Disk Types and Performance.

Precautions

Executing certain events may cause a brief workload interruption. To ensure that workloads can be restored quickly, make sure your application can auto-connect to the DB instance.

Procedure

  1. Log in to the RDS console.
  2. Click in the upper left corner and select a region.
  3. In the navigation pane on the left, choose Events.

    • Authorize: You can authorize an event to be executed immediately or during a scheduled maintenance window. If an authorized event is in the "Pending execution" state, you can change the planned start time of the maintenance window.
    • Cancel: You can revoke an event if it is not an emergency event. A revoked event will not be displayed in the following table.
    • Modify Execution Time: You can change the planned execution time of an event.