Enabling Performance Mode for a FlexusX Instance

Scenarios

FlexusX provides flexible compute resources with QoS-guaranteed performance. FlexusX instances perform as well as exclusive instances most of the time but may occasionally underperform. To meet the strict performance requirements of certain workloads, such as rendering and HPC applications, FlexusX has a performance mode option. If this option is enabled, your FlexusX instances are bound with the underlying CPU cores, so they can provide stable, ultimate QoS-guaranteed performance.

Additional charges apply to performance mode. Table 1 lists the details about the differences between having performance mode enabled or disabled.

**Table 1** Differences between having performance mode enabled or disabled
Performance Mode	vCPU Allocation Logic	vCPU Range	Scenarios
Disabled	Flexible compute with QoS-guaranteed performance, close to exclusive instances	1~16	E-commerce going global, enterprise website building, applet development, development and testing, enterprise resource planning (ERP), game servers, and e-commerce livestreaming
Enabled	CPU cores bound to provide QoS-guaranteed ultimate, stable performance	2 to 32	Web 3.0 application development, rendering, cryptocurrency, ERP, game servers, live commerce, e-commerce going global, enterprise website building, applet development, and development and testing

Enabling Performance Mode

You can enable performance mode for a FlexusX instance during or after the instance creation.

Performance mode is only available in some regions. For details, see the information displayed on the management console.

Enabling performance mode when purchasing a FlexusX instance
Once the instance is created, you can enjoy stable, ample performance immediately.
Enabling performance mode after a FlexusX instance is purchased
You can enable the performance mode for the instance using the Modify Specifications option. During this process, you may also need to modify the instance specifications if there are insufficient underlying resources. For details about how to modify specifications, see Modifying the Specifications of a FlexusX Instance.

Before enabling the performance mode, you need to stop the FlexusX instance.

Figure 1 Enabling performance mode using the Modify Specifications option