Perform this task to check the system for operating and performance issues and any other risks that might negatively impact VM services and rate the system health state. System health check provides information about the system, compute resources, storage resources, network resources, and HA service state. On detection of any exceptions, the system automatically provides recommended actions to help you maintain or restore system health. The detection results can be printed and exported.
Click Hotkey on the top navigation bar, and then select Health Check.
Select health check options, and then click Start. You can click Select All to select all options.
After completing the health check, the system displays the number of check options and numbers of failures and alarms, if any. To switch between the check item list, normal item list, and abnormal item list, click All Items, Normal, or Abnormal.
To cancel a health check, click Stop.
To perform a new health check, click Recheck, reselect options, and then click Start.
To print the check result, click Print.
To export the check result, click Export.
CPU Overcommitment: Checks the ratio of assigned vCPUs to physical CPU cores (including those cores created by using hyperthreading) on each compute node of CAS. If that ratio exceeds 100%, unstable server operation and unexpected errors will occur. In a virtualized environment, high CPU overcommitment can cause slow response or even abnormality of the services provided by the VMs running on a server. As a best practice, limit the CPU overcommitment ratio to be below 200%.
Memory Overcommitment: Checks the ratio of assigned virtual memory to physical memory on each compute node of CAS. If that ratio exceeds 100%, unstable server operation and unexpected errors will occur. In a virtualized environment, high memory overcommitment can cause slow response or even abnormality of the services provided by the VMs running on a server. As a best practice, limit the memory overcommitment ratio to be below 80%.
Storage Overcommitment: Checks the ratio of assigned virtual disk capacity to physical disk capacity on each shared storage volume of CAS. If that ratio exceeds 80% on a shared storage volume, VMs that use this storage volume cannot perform disk I/O read or write operations, and the services provided by the VMs will be interrupted. As a best practice, limit the storage overcommitment ratio to be below 80%.