Some applications, such as Java applications, consume a large amount of CPU resources during startup to load a large amount of cache data. After the data is loaded, their CPU usage returns to a normal level and no longer requires high CPU specifications. You can enable the CPU Burst feature to avoid wasting resources by provisioning an instance with unnecessarily high CPU specifications.
Conditions
SAE supports a CPU Burst multiplier of 2× for 300 seconds by default. This setting cannot be changed.
The CPU Burst feature is available only for application instances with instance types of 4 cores or fewer.
This feature is available only in the China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), and China (Shenzhen) regions.
Enable CPU Burst
This topic describes the key steps. For the detailed procedure, see Deploy applications.
Enable CPU Burst during application creation
In the SAE application list, select the destination region and namespace from the top navigation bar, and then click Create Application.
On the Create Application page, configure the following information.
In the Capacity Settings section of the Application Basic Information wizard page, set Instance Type.
ImportantTo enable the CPU Burst feature, the instance type for the application cannot exceed 4 cores.
In the CPU Burst Configuration section of the Advanced Settings wizard page, enable the CPU Burst feature.
Click Create Application.
Enable CPU Burst during application deployment
To enable the CPU Burst feature, the instance type for this application cannot exceed 4 cores.
In the SAE application list, select the destination region and namespace from the top navigation bar, and then click the target Application ID to open the application details page.
On the Basic Information tab for the target application, click Deploy Application.
In the Deploy Application panel, in the CPU Burst Configuration section, enable the CPU Burst feature.
Click OK.
Verify the result
On the Basic Information tab for the target application, click the Instance List tab. Then, click Webshell in the Actions column for the target instance ID.
On the command line, run the
nproccommand to view the CPU specification of the instance. The CPU specification of the instance is initially 2 cores. After 300 seconds, the CPU specification reverts to the original setting of 1 core.