A live session is the most recent 5GB of diagnostic data for a System Profile and is stored on an AppMon Server. Each System Profile has one (and only one) live session. All PurePath sessions refer to live session data.
Live sessions are continuously persisted and streamed to disk at 10-second intervals if Continuous Transaction Store is enabled in Server > Storage.
Live sessions can be explicitly recorded and stored. Right-click the desired System Profile and select Cockpit > Session Storage > Start / Stop Recording or Cockpit > Session Storage > Store Session. Stored Sessions are available through Cockpit > Session Storage and accessible from the AppMon Server.