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Diffstat (limited to 'synapse/metrics/__init__.py')
| -rw-r--r-- | synapse/metrics/__init__.py | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index 3b499efc07..13a5bc4558 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -214,7 +214,12 @@ class GaugeBucketCollector: Prometheus, and optimise for that case. """ - __slots__ = ("_name", "_documentation", "_bucket_bounds", "_metric") + __slots__ = ( + "_name", + "_documentation", + "_bucket_bounds", + "_metric", + ) def __init__( self, @@ -242,11 +247,16 @@ class GaugeBucketCollector: if self._bucket_bounds[-1] != float("inf"): self._bucket_bounds.append(float("inf")) - self._metric = self._values_to_metric([]) + # We initially set this to None. We won't report metrics until + # this has been initialised after a successful data update + self._metric = None # type: Optional[GaugeHistogramMetricFamily] + registry.register(self) def collect(self): - yield self._metric + # Don't report metrics unless we've already collected some data + if self._metric is not None: + yield self._metric def update_data(self, values: Iterable[float]): """Update the data to be reported by the metric |