Each time the TM1 instance stops, Pulse creates a dump file which contains history of data of the previous 10 min before the dump file is created.
The dump file gives you lots of information such as who was logged in, which processes were running, a snapshot of TM1top during the past 10 min....
The dump file can also be created by any alerts if the option to create dump file is ticked:
What's inside the dump file:
In the email alert, you'll see a snapshot of TM1top:
If you want to investigate in more details why this alert has been triggered, the dump file is always a good place to start.