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Diffstat (limited to '')
| -rw-r--r-- | synapse/metrics/metric.py | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/synapse/metrics/metric.py b/synapse/metrics/metric.py index e87b2b80a7..1d054dd557 100644 --- a/synapse/metrics/metric.py +++ b/synapse/metrics/metric.py @@ -50,7 +50,14 @@ class BaseMetric(object): class CounterMetric(BaseMetric): """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): super(CounterMetric, self).__init__(*args, **kwargs) @@ -59,7 +66,7 @@ class CounterMetric(BaseMetric): # Scalar metrics are never empty if self.is_scalar(): - self.counts[()] = 0 + self.counts[()] = 0. def inc_by(self, incr, *values): if len(values) != self.dimension(): @@ -78,7 +85,7 @@ class CounterMetric(BaseMetric): self.inc_by(1, *values) 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): return map_concat(self.render_item, sorted(self.counts.keys())) |