The Health tab provides an at-a-glance view of the health of the
objects in each monitored replica set. Health is indicated by icons
that are red, yellow, or green.
Red indicates a critical condition that requires immediate
attention.
Yellow indicates a warning condition that might not result in
replication problems but should still be investigated or
monitored.
Green indicates that no problems with replication were
detected.
For information about events or conditions that cause replica
set health to be red (critical) or yellow (warning), see Understanding Health
Ratings.
In the Health tab, you can:
View the health of all replica sets, or use the Health
filter drop-down list to view a subset of replica sets based on
health.
View how long ago the last data collection or health change
occurred by selecting Last update or Current health
in the Show drop-down list. (If no data collection or health
change has ever occurred, they are shown as "Not Set.")
View the current health of all replica sets, or use the Date
filter drop-down list to view past health, such as 24 hours
ago, last week, or a custom set of dates.