Help Center/ Elastic Volume Service/ FAQs/ Capacity/ How Can I Monitor My Disk Usages?
Updated on 2025-08-04 GMT+08:00
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How Can I Monitor My Disk Usages?

Some disk monitoring metrics require that the agent to be installed.

For details about how to install the Agent on an ECS, see Installing the Agent on a Linux Server in the Cloud Eye User Guide.

Table 1 Disk metrics

Metric

Parameter

Description

Value Range

Unit

Conversion Rule

Monitored Object & Dimension

Monitoring Period (Raw Data)

disk_free

(Agent) Available Disk Space

Free space on the disks

  • Linux: Run the df -h command to check the value in the Avail column. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).
  • Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).

≥0

GB

N/A

ECS - Mount point

1 minute

disk_total

(Agent) Disk Storage Capacity

Total space on the disks, including used and free

  • Linux: Run the df -h command to check the value in the Size column.

    The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).

  • Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).

≥0

GB

N/A

ECS - Mount point

1 minute

disk_used

(Agent) Used Disk Space

Used space on the disks

  • Linux: Run the df -h command to check the value in the Used column. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).
  • Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).

≥0

GB

N/A

ECS - Mount point

1 minute

disk_usedPercent

(Agent) Disk Usage

Percentage of total disk space that is used, which is calculated as follows: Disk Usage = Used Disk Space/Disk Storage Capacity

  • Linux: It is calculated as follows: Used/Size. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).
  • Windows: Use the WMI interface to call GetDiskFreeSpaceExW API to obtain disk space data. The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), periods (.), and swung dashes (~).

0-100

%

N/A

ECS - Mount point

1 minute
Parent topic: Capacity