See for example https://phabricator.wikimedia.org/diffusion/EMML/manage/.
Example:
09:33:12 <icinga-wm> PROBLEM - PHD should be supervising processes on phab1001 is CRITICAL: PROCS CRITICAL: 2 processes with UID = 497 (phd) https://wikitech.wikimedia.org/wiki/Phabricator
09:35:35 <icinga-wm> RECOVERY - PHD should be supervising processes on phab1001 is OK: PROCS OK: 4 processes with UID = 497 (phd) https://wikitech.wikimedia.org/wiki/Phabricator
Maybe check logs and icinga to see if it needs fixing