After some discussion about the incident report: this was originally a noisy neighbors issue, but mongo had a hard time recovering after the controllers were moved away from their neighbors.
Leaving triaged as Medium, as there is work to do in the long run to make Juju more robust in this situation. But the underlying cause was resource starvation, and there aren't simple/immediate fixes.
After some discussion about the incident report: this was originally a noisy neighbors issue, but mongo had a hard time recovering after the controllers were moved away from their neighbors.
Leaving triaged as Medium, as there is work to do in the long run to make Juju more robust in this situation. But the underlying cause was resource starvation, and there aren't simple/immediate fixes.