Counter

The counter() function allows you to get increment rates of increasing counter values. Main use case for using counter() is to get rates per second of JMX counter beans (e.g. “Tomcat Requests”). The counter function requires one parameter key to identify the counter.

per_second(value)

counter('requests').per_second(get_total_requests())

Returns the value’s increment rate per second. Value must be a float or integer.

per_minute(value)

counter('requests').per_minute(get_total_requests())

Convenience method to return the value’s increment rate per minute (same as result of per_second() divided by 60).

Internally counter values and timestamps are stored in Redis.