Sentinel Monitoring Plus has got a session timeout mechanism implemented.

The mechanism sends requests regularly to the server to ensure that the current session is not a dead session.

This mechanism has been implemented since Sentinel Monitoring Plus 3.3.0 SP6 so newer versions embed it.
The default value set for the timeout before SM+ 3.3.0 SP10 is 30s, since 3.3.0 SP10 it is 30min.

The recommended value is 30min, the maximum value is 60min.

Performance
Interface
Memory

To modify the timeout parameter in Sentinel Monitoring Plus, please follow the procedure below:
  - open the web.xml file under the SentinelMonitoringPlus\WEB-INF folder on the Web Server
  - add the lines:
<context-param>
<param-name>sentinel.Viewer.session.timeout</param-name>
<param-value>30</param-value>
</context-param>

before the first <servlet> tag. The param value is in minutes.
   - load the new configuration in the webserver