diff options
Diffstat (limited to 'synapse/metrics')
| -rw-r--r-- | synapse/metrics/__init__.py | 16 | ||||
| -rw-r--r-- | synapse/metrics/metric.py | 44 |
2 files changed, 28 insertions, 32 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index bba2657075..f317034b8f 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -34,11 +34,7 @@ from .metric import ( logger = logging.getLogger(__name__) -# We'll keep all the available metrics in a single toplevel dict, one shared -# for the entire process. We don't currently support per-HomeServer instances -# of metrics, because in practice any one python VM will host only one -# HomeServer anyway. This makes a lot of implementation neater -all_metrics = {} +all_metrics = [] class Metrics(object): @@ -54,7 +50,7 @@ class Metrics(object): metric = metric_class(full_name, *args, **kwargs) - all_metrics[full_name] = metric + all_metrics.append(metric) return metric def register_counter(self, *args, **kwargs): @@ -85,12 +81,12 @@ def render_all(): # TODO(paul): Internal hack update_resource_metrics() - for name in sorted(all_metrics.keys()): + for metric in all_metrics: try: - strs += all_metrics[name].render() + strs += metric.render() except Exception: - strs += ["# FAILED to render %s" % name] - logger.exception("Failed to render %s metric", name) + strs += ["# FAILED to render"] + logger.exception("Failed to render metric") strs.append("") # to generate a final CRLF diff --git a/synapse/metrics/metric.py b/synapse/metrics/metric.py index 368fc24984..341043952a 100644 --- a/synapse/metrics/metric.py +++ b/synapse/metrics/metric.py @@ -47,9 +47,6 @@ class BaseMetric(object): for k, v in zip(self.labels, values)]) ) - def render(self): - return map_concat(self.render_item, sorted(self.counts.keys())) - class CounterMetric(BaseMetric): """The simplest kind of metric; one that stores a monotonically-increasing @@ -83,6 +80,9 @@ class CounterMetric(BaseMetric): def render_item(self, k): return ["%s%s %d" % (self.name, self._render_key(k), self.counts[k])] + def render(self): + return map_concat(self.render_item, sorted(self.counts.keys())) + class CallbackMetric(BaseMetric): """A metric that returns the numeric value returned by a callback whenever @@ -126,30 +126,30 @@ class DistributionMetric(object): class CacheMetric(object): - """A combination of two CounterMetrics, one to count cache hits and one to - count a total, and a callback metric to yield the current size. + __slots__ = ("name", "cache_name", "hits", "misses", "size_callback") - This metric generates standard metric name pairs, so that monitoring rules - can easily be applied to measure hit ratio.""" - - def __init__(self, name, size_callback, labels=[]): + def __init__(self, name, size_callback, cache_name): self.name = name + self.cache_name = cache_name - self.hits = CounterMetric(name + ":hits", labels=labels) - self.total = CounterMetric(name + ":total", labels=labels) + self.hits = 0 + self.misses = 0 - self.size = CallbackMetric( - name + ":size", - callback=size_callback, - labels=labels, - ) + self.size_callback = size_callback - def inc_hits(self, *values): - self.hits.inc(*values) - self.total.inc(*values) + def inc_hits(self): + self.hits += 1 - def inc_misses(self, *values): - self.total.inc(*values) + def inc_misses(self): + self.misses += 1 def render(self): - return self.hits.render() + self.total.render() + self.size.render() + size = self.size_callback() + hits = self.hits + total = self.misses + self.hits + + return [ + """%s:hits{name="%s"} %d""" % (self.name, self.cache_name, hits), + """%s:total{name="%s"} %d""" % (self.name, self.cache_name, total), + """%s:size{name="%s"} %d""" % (self.name, self.cache_name, size), + ] |