[sf-perl] Fred Moyer's "Better Service Monitoring"

[yary]

Looked through the slides. There's a concept from manufacturing that
comes to mind, "Statistical process control,"
https://en.wikipedia.org/wiki/Statistical_process_control that lays
out a few other heuristics for warning about out-of-control processes.
The methods you found from experience are more appropriate than their
general recommendations, just thought I'd paste the link for anyone
interested in the theory.