Log File with Active User Sessions?

Certified Lead Developer

Was wondering if the number of active user sessions is logged anywhere?  I know that in system.csv there is an active sessions metrics captured, but that's active application sessions, which is not 1 to 1 with active users.  I could look into the login audit log, but this doesn't capture log out, so I'm really at a loss on how to answer the question "How many active users were in the system at noon?".

Any thoughts on this?  Is there a log file where this is captured?  Or can this be derived from other data that is logged?

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