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Uptime History

The Uptime History shows you the reboot cycles for your monitored hosts - as reported by the Operating System - regardless of the network availability of the host itself. This is useful for finding hosts that reboot often and also to compare the uptime of monitored hosts alongside each other.

The Uptime History can sometimes reveal problems that are otherwise not visible from the network availability or other health checks. For example, a server that is rebooted every 15 days might have a higher network availability than a server that is down for two hours of due to a hardware error. However, it is in most cases not desirable to have a server require a recent reboot and the uptime history can reveal that.

The Uptime History allows you to generate the following reports:

Uptime History of all computers in a group

The screenshot below shows the uptime of all computers in the Servers group. The chart on the left hand side shows the last 15 reboots, whereas the table to the right shows the complete history of reboots according to the limit that was set. You can increase the number of reboots shown in the chart by setting the "Chart Size" to "Full Width".

Side-By-Side Comparison

You can compare the uptime of individual hosts, by selecting the computers from the list (hold CTRL while selecting multiple computers), make sure that the group selection is set to "None". The screenshot below shows the uptime of a MSSQL and a MySQL database server, and you can see  that their uptime has been similar over a three-month period.

This report also reveals that both servers are usually rebooted after Patch Tuesday around 9AM, but that two reboots on 9/3/ and 9/16/ (marked in yellow) were irregular and could be investigated using an event search.

Please note that the dotted line towards the right of the chart indicates the current uptime.