A library to easily measure what’s going on in your python.
Installing
To install :
pip install metrology
API
Gauge
A gauge is an instantaneous measurement of a value
class JobGauge(metrology.instruments.Gauge):
def value(self):
return len(queue)
gauge = Metrology.gauge('pending-jobs', JobGauge())
Counters
A counter is like a gauge, but you can increment or decrement its value
counter = Metrology.counter('pending-jobs')
counter.increment()
counter.decrement()
counter.count
Meters
A meter measures the rate of events over time (e.g., “requests per second”). In addition to the mean rate, you can also track 1, 5 and 15 minutes moving averages
meter = Metrology.meter('requests')
meter.mark()
meter.count
Timers
A timer measures both the rate that a particular piece of code is called and the distribution of its duration
timer = Metrology.timer('responses')
with timer:
do_something()
Utilization Timer
A specialized timer that calculates the percentage of wall-clock time that was spent
utimer = Metrology.utilization_timer('responses')
with utimer:
do_something()
Reporters
Logger Reporter
A logging reporter that write metrics to a logger
reporter = LoggerReporter(level=logging.INFO, interval=10) reporter.start()
Graphite Reporter
A graphite reporter that send metrics to graphite
reporter = GraphiteReporter('graphite.local', 2003)
reporter.start()
Acknowledgement
This is heavily inspired by the awesome metrics library.
1 maintainer
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