Record and persist relevant metrics

[ghost]

I was thinking of a stats module that does on the fly calculations at x intervals, including total and individual response times, max times, error rate and current RPS.

These could be converted to a Graphite formatted text and pushed to port 2003 to be picked up by InfluxDB. Grafana can then read the data and present it in visual form.

Another option would be to use a rest-client to write to InfluxDB via HTTP.