The delay to mark the database as unhealthy should be configurable. currently, it looks like hardcoded to 15 milliseconds. https://github.com/coder/coder/blob/b6e808d11628f6c407ca1c025a717edae0533173/coderd/healthcheck/database.go#L49-L51 I have a deployment where the remote db has 28-29 ms latency, and Coder is marking it as unhealthy. 
The delay to mark the database as unhealthy should be configurable. currently, it looks like hardcoded to 15 milliseconds.
coder/coderd/healthcheck/database.go
Lines 49 to 51 in b6e808d
I have a deployment where the remote db has 28-29 ms latency, and Coder is marking it as unhealthy.