Historical diagnosis

Limitations

• diagnosis object: ACS/ECI instances.

  Historical Diagnosis does not support some ACS instances. To request support for your instance, submit a ticket.

• diagnosis item: You can diagnose OOM events that occurred on ACS/ECI instances within the last 14 days. You can run the diagnosis even after an instance is released.

• Supported regions and availability zones:

  Region	Region ID	Availability zone
  China (Ulanqab)	cn-wulanchabu	A, B, and C
  China (Chengdu)	cn-chengdu	A and B
  China (Beijing)	cn-beijing	C, D, E, F, G, H, I, and K
  China (Hangzhou)	cn-hangzhou	B, G, H, I, J, and K
  China (Shenzhen)	cn-shenzhen	A, C, D, E, and F

Prerequisites

• If you are a RAM user, ensure the primary Alibaba Cloud account attaches theAliyunECSReadOnlyAccess andAliyunSysomFullAccess system policies to you. For more information, see Manage RAM user permissions.

• When you log on to the Operation System Service console for the first time, click Enable Console Service.

Procedure

1. Go to Operation System Service console - System Diagnosis. In the top-left corner of the navigation pane, select the region for the target instance.

2. Select the Historical Diagnosis mode.

3. Enter the instance ID and the time range for the diagnosis, and then run the diagnosis.

Set diagnosis type to Memory Diagnosis and diagnosis item to OOM Diagnosis. For diagnosis object, select ACS/ECI Instance ID and enter the target instance ID.