The connection time is higher than usual. ConnectionTime is the average time, in milliseconds, that it took Route 53 health checkers to establish a TCP connection with the endpoint.
The Health Check failed. HealthCheckStatus is the status of the health check endpoint that CloudWatch is checking. 1 indicates healthy, and 0 indicates unhealthy.
The time to first byte is higher than usual. TimeToFirstByte is the average time, in milliseconds, that it took Route 53 health checkers to receive the first byte of the response to an HTTP or HTTPS request.