Scanner Health

The Scanner Health page provides you with information about the performance of your Tenable Nessus scanner. You can monitor real-time health and performance data to help troubleshoot scanner issues. Scanner alerts provide information about system errors that may cause your scanner to malfunction. Tenable Nessus updates the information every 30 seconds.

For information, see Monitor Scanner Health.

Tenable Nessus organizes the scanner health information into three categories: Overview, Network, and Alerts.

Overview

Widget	Description	Actions
Current Health	Widgets showing Nessus memory used in MB, CPU load, and the number of hosts Tenable Nessus is scanning.	None
Scanner Alerts	Alerts about areas where your Tenable Nessus scanner performance may be suffering. Alerts can have a severity level of Info, Low, Medium, or High.	Click an alert to see more details. If there are more than five alerts, click More Alerts to see the full list of alerts.
System Memory	Chart showing how much of your system memory Tenable Nessus is using.	None
Nessus Data Disk Space	Chart showing the percentage of free and used disk space on the disk where you installed Tenable Nessus's data directory.	None
Memory Usage History	Graph showing how many MB of memory Tenable Nessus used over time.	Hover over a point on the graph to see detailed data.
CPU Usage History	Graph showing the percentage of CPU load Tenable Nessus used over time.	Hover over a point on the graph to see detailed data.
Scanning History	Graph showing the number of scans Tenable Nessus ran and active targets Tenable Nessus scanned over time.	Hover over a point on the graph to see detailed data.

Network

Widget	Description	Actions
Scanning History	Graph showing the number of scans Tenable Nessus ran and active targets Tenable Nessus scanned over time.	Hover over a point on the graph to see detailed data.
Network Connections	Graph showing the number of TCP sessions Tenable Nessus creates during scans over time.	Hover over a point on the graph to see detailed data.
Network Traffic	Graph showing how much traffic Tenable Nessus is sending and receiving over the network over time.	Hover over a point on the graph to see detailed data.
Number of DNS Lookups	Graph showing how many reverse DNS (rDNS) and DNS lookups Tenable Nessus performs over time.	Hover over a point on the graph to see detailed data.
DNS Lookup Time	Graph showing the average time that Tenable Nessus takes to perform rDNS and DNS lookups over time.	Hover over a point on the graph to see detailed data.

Alerts

Widget	Description	Actions
Scanner Alerts	List of alerts about areas where your Tenable Nessus scanner performance may be suffering. Alerts can have a severity level of Info, Low, Medium, or High.	Click an alert to see more details.