What happens when restart.txt is not present in the tmp folder for Passenger?

I'm trying to figure out if the absence of the restart.txt file in the tmp folder of a Rails ap开发者_开发问答p can cause any kind of memory leakage or infinite loops.

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As far as I'm aware, that file is only present to have its timestamp checked via this simplified algorithm each time a request comes in:

1. Is there a tmp/restart.txt?
2. If so, is its last-updated timestamp newer than any passenger instance?
3. If so, kill the passenger instance and start a new one.

Not having a tmp/restart.txt file won't have any negative side effects.