We are maxing out the 5351 mysql connections provided by our

db.m4.4xlarge

type host. Is that normal? Why are there so many database connections?

How many Fleet servers are running? How many hosts enrolled? You can configure the connection limit with https://github.com/fleetdm/fleet/blob/master/docs/infrastructure/configuring-the-fleet-binary.md#mysql_max_open_conns

3 replicas. I'll fiddle with

max_open_conns

Is it currently set to something above the default (50)?

5461

(which is higher than

5351

so I guess that's the issue)

Ah yes, and that's going to be per server.

oh, that's a good point!