Internal Monitoring

The Internal Monitoring tab displays the VM performance data, such as the CPU, memory, and disk capacity, obtained by the agent from a host. These data is displayed dynamically in real time through graphs.
Note: Before you can view the internal monitoring data, install an agent for the VM instance. For details about how to install the agent, see Internal Monitoring Agent.

CPU

You can select a time span to view the real-time CPU utilization of a VM instance.
  • Available time spans: 15 minutes, 1 hour, 6 hours, 1 day, 1 week, 1 month, 1 year, and custom.
  • Monitoring metrics:
    • system: The percentage of CPUs occupied by the current kernel space of the VM instance.
    • user: The percentage of CPUs occupied by the current user process of the VM instance.
    • wait: The percentage of CPUs used for waiting for the I/O operations of the VM instance.
    • idle: The percentage of idle CPUs of the VM instance.
    • used: The percentage of used CPUs of the VM instance.
  • Monitoring object:
    • Select All: Display the average, real-time utilization of all CPUs of a VM instance and the utilization of a single CPU.
    • Average: Display the average, real-time utilization of all CPUs of a VM instance.
    • Single CPU: Display the real-time utilization of a single CPU, such as CPU No. 1, No.2, and No. 3.
Figure 1. CPU Real-Time Monitoring


Memory

You can select a time span to view the real-time memory utilization of a VM instance.
  • Available time spans: 15 minutes, 1 hour, 6 hours, 1 day, 1 week, 1 month, 1 year, and custom.
  • Monitoring metrics:
    • used: The used memory of a VM instance.
    • available: The available memory of a VM instance.
    • free: The idle memory of a VM instance.
    • total: The total memory of a VM instance.
    • freeutilization: The percentage of idle memory of a VM instance.
    • usedutilization: The percentage of the used memory of a VM instance.
Figure 2. Memory Real-Time Monitoring


Note: For memory data, internal monitoring is more accurate than external monitoring. We recommend that you use internal monitoring to monitor the memory data.

Disk Capacity

You can select a time span to view the real-time disk capacity of a VM instance.
  • Available time spans: 15 minutes, 1 hour, 6 hours, 1 day, 1 week, 1 month, 1 year, and custom.
  • Monitoring metrics:
    • Disk utilization: The percentage of used disk of a VM instance.
    • Disk used capacity: The used capacity of the VM disk.
    • Disk idle rate: The percentage of idle disk capacity of a VM instance.
    • Disk idle capacity: The idle disk capacity of a VM instance.
  • Monitoring object:
    • Select All: Display the real-time status of all disk partitions.
    • Single disk partition: Display the real-time read/write status of a single disk partition, such as the vda partition.
Figure 3. Disk Capacity Real-Time Monitoring