New Relic

imgproxy can send its metrics to New Relic. To use this feature, do the following:

Register at New Relic and get a license key.
Set the IMGPROXY_NEW_RELIC_KEY environment variable to the license key.
(optional) Set the IMGPROXY_NEW_RELIC_APP_NAME environment variable to be the desired application name.

imgproxy will send the following info to New Relic:

CPU and memory usage
Response time
Image downloading time
Image processing time
Errors that occurred while downloading and processing an image