Hardware Requirements

Nessus Agents

Nessus Agents are designed to be lightweight and to use only minimal system resources. Generally, a Nessus Agent uses 40 MB of RAM (all pageable). A Nessus Agent uses almost no CPU while idle, but is designed to use up to 100% of CPU when available during jobs.

For more information on Nessus Agent resource usage, see Nessus Agents Performance.

The following table outlines the minimum recommended hardware for operating a Nessus Agent. Nessus Agents can be installed on a virtual machine that meets the same requirements specified.

Hardware

Minimum Requirement

Processor

1 Dual-core CPU

Processor Speed

> 1 Ghz

RAM > 1 GB
Disk Space

> 1 GB with normal usage

> 2 GB under certain conditions, e.g. when a plugins-code.db defragmentation operation is in progress

Disk Speed 15-50 IOPS

Nessus Manager

Scenario

Minimum Recommended Hardware

Nessus Manager with 0-10,000 agents

CPU: 4 2GHz cores

Memory: 16 GB RAM

Disk space: 30 GB, not including space used by the host operating system.

Note: Scan results and plugin updates require more disk space over time.

Nessus Manager with 10,001-20,000 agents

 

CPU: 8 2GHz cores

Memory: 64 GB RAM

Disk space: 30 GB, not including space used by the host operating system.

Note: Scan results and plugin updates require more disk space over time.

Note: Engage with your Tenable representative for large deployments.