Help Center/ Elastic Volume Service/ FAQs/ Capacity/ How Can I Monitor My Disk Usages?
Updated on 2026-02-14 GMT+08:00
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How Can I Monitor My Disk Usages?

Some disk monitoring metrics require 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

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 tildes (~).
  • 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 tildes (~).

≥0

GB

N/A

instance_id,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 tildes (~).

  • 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 tildes (~).

≥0

GB

N/A

instance_id,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 tildes (~).
  • 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 tildes (~).

≥0

GB

N/A

instance_id,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 tildes (~).
  • 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 tildes (~).

0-100

%

N/A

instance_id,mount_point

1 minute
Parent topic: Capacity