Help Center/ Host Security Service/ FAQs/ Agent/ How Many CPU, Memory, and Disk Resources Are Occupied When the Agent Is Running?
Updated on 2025-07-04 GMT+08:00
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How Many CPU, Memory, and Disk Resources Are Occupied When the Agent Is Running?

HSS uses lightweight agents, which occupy only a few resources and do not affect your services or containers.

This section describes the CPU, memory, and disk resources occupied by the agent on the server and container nodes when the agent performs a scan task. The agent is scheduled to scan your servers and containers from 00:00 to 04:00 every day. It does not affect your server of container performance.

Maximum CPU Usage

While the agent runs on a server or container node, the general CPU usage does not exceed 20% of a vCPU. While the agent performs a virus scan, it works with the virus scan program, and their total CPU usage do not exceed 30% of multiple vCPUs. The actual CPU usage depends on your server specifications. For details, see Table 1.

If the CPU usage exceeds 20% of a vCPU, the agent will automatically reduce CPU usage, spending more time on scans. This does not affect your services. If the CPU usage exceeds 25% of a vCPU, the agent will be automatically restarted.

For details about virus scan, see Virus Scan.

Table 1 CPU usage of the agent for different vCPU specifications

vCPUs

Max. CPU Usage

Max. CPU Usage During Virus Scan

1vCPUs

20%

50%

2vCPUs

10%

40%

4vCPUs

5%

35%

8vCPUs

2.5%

32.5%

12vCPUs

About 1.67%

About 31.67%

16vCPUs

About 1.25%

About 31.25%

24vCPUs

About 0.84%

About 30.84%

32vCPUs

About 0.63%

About 30.63%

48vCPUs

About 0.42%

About 30.42%

60vCPUs

About 0.34%

About 30.34%

64vCPUs

About 0.32%

About 30.32%

Peak Memory Usage

While the agent runs on a server, the maximum memory usage is 500 MB. While the agent runs a virus scan task, it works with the virus scan program, and their total memory usage is 800 MB on average.

While the agent runs on a container node, its memory usage varies by the agent deployment mode.

  • Single-node installation: If you install the agent on every node by referring to Installing the Agent on Servers, the agent generally occupies 500 MB memory at most. While the agent performs a virus scan task, it works with the virus program, and their total memory usage is 800 MB on average.
  • Cluster Installation: If you connect the entire cluster to HSS by referring to Installing the Agent in a Cluster, the agent will run as a DaemonSet. Generally, the agent occupies 1,100 MB memory at most. While the agent runs a virus scan task, it works with the virus scan program, and their total memory usage is 1,400 MB on average.

If the agent memory usage exceeds the maximum memory limit, the agent will be automatically restarted within 5 minutes.

For details about virus scan, see Virus Scan.

Peak Disk Usage

While the agent runs on a server or container node, its disk usage is as follows:

  • Linux: The installation directory is under /usr/local/hostguard and occupies up to 600 MB. The log directory is under /var/log/hostguard/ and occupies up to 250 MB.
  • Windows: The installation directory and log directories are under in C:\Program Files\HostGuard and occupies up to 700 MB.
Parent topic: Agent