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Merge pull request #2778 from matrix-org/rav/counters_should_be_floats

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Make Counter render floats
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Richard van der Hoff 2018-01-15 14:09:53 +00:00 committed by GitHub
commit 5e16c1dc8c
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1 changed files with 10 additions and 3 deletions
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synapse/metrics/metric.py
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@ -50,7 +50,14 @@ class BaseMetric(object):
class CounterMetric(BaseMetric): class CounterMetric(BaseMetric):
"""The simplest kind of metric; one that stores a monotonically-increasing """The simplest kind of metric; one that stores a monotonically-increasing
integer that counts events.""" value that counts events or running totals.
Example use cases for Counters:
- Number of requests processed
- Number of items that were inserted into a queue
- Total amount of data that a system has processed
Counters can only go up (and be reset when the process restarts).
"""
def __init__(self, *args, **kwargs): def __init__(self, *args, **kwargs):
super(CounterMetric, self).__init__(*args, **kwargs) super(CounterMetric, self).__init__(*args, **kwargs)
@ -59,7 +66,7 @@ class CounterMetric(BaseMetric):
# Scalar metrics are never empty # Scalar metrics are never empty
if self.is_scalar(): if self.is_scalar():
self.counts[()] = 0 self.counts[()] = 0.
def inc_by(self, incr, *values): def inc_by(self, incr, *values):
if len(values) != self.dimension(): if len(values) != self.dimension():
@ -78,7 +85,7 @@ class CounterMetric(BaseMetric):
self.inc_by(1, *values) self.inc_by(1, *values)
def render_item(self, k): def render_item(self, k):
return ["%s%s %d" % (self.name, self._render_key(k), self.counts[k])] return ["%s%s %.12g" % (self.name, self._render_key(k), self.counts[k])]
def render(self): def render(self):
return map_concat(self.render_item, sorted(self.counts.keys())) return map_concat(self.render_item, sorted(self.counts.keys()))