what happens at 4am ?

[William Reich]

Hi...

On several occasions , on different machines, I have
observed via logs strange system behavior at 4am ( or 4:03am ).

The load on the machine seems to increase such that my application
complains about not getting enough time to do its job.

Does anybody know if there is a documented reason for
stuff to run at this moment in the day ?

I am still trying to "google it"...

thanks

wr