Performance risk event notification-Elastic Compute Service(ECS)-阿里云帮助中心

Alibaba Cloud sends performance risk events when an ECS instance's CPU, storage, or network performance reaches its instance type limits, or when connectivity checks fail.

Event list

Note

Some events are not fully available yet. If performance risk event alerts are too frequent, create a subscription policy to add the corresponding risk events to a blacklist.

Event code	Event name	Event level	CloudMonitor event	Event description	Solution
Instance:CPUPerformanceReachLimit	CPU performance reaches the instance type limit	Warn	Instance:CPUPerformanceReachLimit:Executed : The CPU performance of the instance reaches the upper limit of the instance type	The CPU utilization of the instance reaches 100% or the instance type limit. Criteria: An event is sent if the CPU reaches the instance type limit twice within three minutes. Default silence period: 10 minutes. Type descriptions: `CPULimit`: CPU utilization reaches 100%. `CreditLimit`: The burstable instance reaches the instance type limit.	Sustained CPU utilization at the instance type limit may affect your business. Adjust resources as needed. See Troubleshooting and handling high CPU utilization or load on Linux instances and Troubleshooting and handling high CPU utilization on Windows instances.
Instance:StoragePerformanceReachLimit	Storage performance reaches the instance type limit	Warn	Instance:StoragePerformanceReachLimit:Executed : The storage performance of the instance reaches the upper limit of the instance type	The disk bandwidth or IOPS of the instance reaches the instance type limit. Criteria: An event is sent if storage performance reaches the instance type limit twice within three minutes. Default silence period: 10 minutes. Note The `StoragePerformanceReachLimit` event is not supported for instance types earlier than the 6th generation. Type descriptions: `EcsBaseBPS`: Disk bandwidth reaches the instance type limit. `EcsBurstBPS`: Disk bandwidth reaches the burst limit of the instance type. `EcsBaseIOPS`: Disk IOPS reaches the instance type limit. `EcsBurstIOPS`: Disk IOPS reaches the burst limit of the instance type.	Sustained storage performance at the instance type limit may affect your business. Adjust resources as needed. See Troubleshooting and handling high disk I/O load on Linux systems and Troubleshooting and handling high disk I/O load on Windows systems.
Instance:NetworkPerformanceReachLimit	Network performance reaches the instance type limit	Warn	Instance:NetworkPerformanceReachLimit:Executed : The network performance of the instance reaches the upper limit of the instance type	The network performance of the instance reaches the instance type limit. Criteria: An event is sent if network performance reaches the instance type limit twice within three minutes. Default silence period: 10 minutes. Type descriptions: `PublicBandwidthRx`: Inbound public bandwidth reaches the limit. `PublicBandwidthTx`: Outbound public bandwidth reaches the limit. `InstanceBandwidthRx`: Inbound bandwidth reaches the limit. `InstanceBandwidthTx`: Outbound bandwidth reaches the limit. `InstanceBurstBandwidthRx`: Inbound bandwidth reaches the burst limit. `InstanceBurstBandwidthTx`: Outbound bandwidth reaches the burst limit. `EcsSessionQuota`: Connections reach the instance type limit. `InboundPacketLoss`: Inbound packet loss due to instance restrictions. `OutboundPacketLoss`: Outbound packet loss due to instance restrictions.	Sustained network performance at the instance type limit may affect your business. Adjust resources as needed. See Troubleshooting and handling high network bandwidth usage on Linux instances and Troubleshooting and handling high network bandwidth usage on Windows instances.
Instance:StatusCheckFailed	Instance status check failed	Warn	Instance:StatusCheckFailed:Executing : Instance status check failure in progress Instance:NetworkPerformanceReachLimit:Executed : Instance status check failure ended	The instance connectivity is abnormal. Criteria: Real-time detection of instance connectivity. Type descriptions: `SysFailed`: Status check failed for the host. `InstanceFailed`: Status check failed for the instance OS.	Instance connectivity is abnormal. Troubleshoot the issue promptly. See Diagnosing the health status of an instance.

Event content

The following example shows the JSON format of the "The CPU performance of the instance reaches the upper limit of the instance type" event notification:

{
    "id": "2256A988-0B26-4E2B-820A-******",
    "product": "ECS",
    "resourceId": "acs:ecs:cn-hangzhou:169070********30:instance/i-bp1ecr********5go2go",
    "level": "WARN",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Instance:CPUPerformanceReachLimit:Executed",
    "content": {
        "eventId":"e-2ze31nb2*******",
        "instanceId":"i-2zebej68iov*******",
        "eventType":"CPUPerformanceReachLimit",
        "eventStatus":"Executed",
        "reasonCode":"CPULimit",
        "publishTime":"2025-06-03T07:08:44Z",
        "notBefore":"2025-06-03T07:08:44Z",
        "executeStartTime":"2025-06-03T07:08:44Z",
        "executeFinishTime":"2025-06-03T07:08:44Z",
        "reason":"CPULimit",
        "privateIpAddress":["10.xxx.xxx.xxx"],
        "publicIpAddress":["192.xxx.xxx.xxx"]
    }
}

The following table describes the content field.

Field	Description	Example value
eventId	The ID of the event.	e-2ze31nb2*******
instanceId	The ID of the instance.	i-bp1ecr********5go2go
eventType	The type of the event.	CPUPerformanceReachLimit
eventStatus	The status of the event.	Executed
reasonCode	The reason code for the event.	CPULimit
publishTime	The time when the event was published.	2025-06-03T07:08:44Z
notBefore	The scheduled execution time.	2025-06-03T07:08:44Z
executeStartTime	The execution start time (UTC).	2025-06-03T07:08:44Z
executeFinishTime	The execution end time (UTC).	2025-06-03T07:08:44Z
reason	The reason for the event.	CPULimit
privateIpAddress	The private IP address of the instance.	["10.xxx.xxx.xxx"]
publicIpAddress	The public IP address of the instance.	["192.xxx.xxx.xxx"]