diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/metrics/__init__.py | 112 | ||||
| -rw-r--r-- | synapse/storage/events.py | 44 |
2 files changed, 123 insertions, 33 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index ef48984fdd..539c353528 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -25,7 +25,7 @@ import six import attr from prometheus_client import Counter, Gauge, Histogram -from prometheus_client.core import REGISTRY, GaugeMetricFamily +from prometheus_client.core import REGISTRY, GaugeMetricFamily, HistogramMetricFamily from twisted.internet import reactor @@ -40,7 +40,6 @@ HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat") class RegistryProxy(object): - @staticmethod def collect(): for metric in REGISTRY.collect(): @@ -63,10 +62,7 @@ class LaterGauge(object): try: calls = self.caller() except Exception: - logger.exception( - "Exception running callback for LaterGauge(%s)", - self.name, - ) + logger.exception("Exception running callback for LaterGauge(%s)", self.name) yield g return @@ -116,9 +112,7 @@ class InFlightGauge(object): # Create a class which have the sub_metrics values as attributes, which # default to 0 on initialization. Used to pass to registered callbacks. self._metrics_class = attr.make_class( - "_MetricsEntry", - attrs={x: attr.ib(0) for x in sub_metrics}, - slots=True, + "_MetricsEntry", attrs={x: attr.ib(0) for x in sub_metrics}, slots=True ) # Counts number of in flight blocks for a given set of label values @@ -157,7 +151,9 @@ class InFlightGauge(object): Note: may be called by a separate thread. """ - in_flight = GaugeMetricFamily(self.name + "_total", self.desc, labels=self.labels) + in_flight = GaugeMetricFamily( + self.name + "_total", self.desc, labels=self.labels + ) metrics_by_key = {} @@ -179,7 +175,9 @@ class InFlightGauge(object): yield in_flight for name in self.sub_metrics: - gauge = GaugeMetricFamily("_".join([self.name, name]), "", labels=self.labels) + gauge = GaugeMetricFamily( + "_".join([self.name, name]), "", labels=self.labels + ) for key, metrics in six.iteritems(metrics_by_key): gauge.add_metric(key, getattr(metrics, name)) yield gauge @@ -193,12 +191,75 @@ class InFlightGauge(object): all_gauges[self.name] = self +@attr.s(hash=True) +class BucketCollector(object): + """ + Like a Histogram, but allows buckets to be point-in-time instead of + incrementally added to. + + Args: + name (str): Base name of metric to be exported to Prometheus. + data_collector (callable -> dict): A synchronous callable that + returns a dict mapping bucket to number of items in the + bucket. If these buckets are not the same as the buckets + given to this class, they will be remapped into them. + buckets (list[float]): List of floats/ints of the buckets to + give to Prometheus. +Inf is ignored, if given. + + """ + + name = attr.ib() + data_collector = attr.ib() + buckets = attr.ib() + + def collect(self): + + # Fetch the data -- this must be synchronous! + data = self.data_collector() + + buckets = {} + + res = [] + for x in data.keys(): + for i, bound in enumerate(self.buckets): + if x <= bound: + buckets[bound] = buckets.get(bound, 0) + data[x] + break + + for i in self.buckets: + res.append([i, buckets.get(i, 0)]) + + res.append(["+Inf", sum(data.values())]) + + metric = HistogramMetricFamily( + self.name, + "", + buckets=res, + sum_value=sum([x * y for x, y in data.items()]), + ) + yield metric + + def __attrs_post_init__(self): + self.buckets = [float(x) for x in self.buckets if x != "+Inf"] + if self.buckets != sorted(self.buckets): + raise ValueError("Buckets not sorted") + + self.buckets = tuple(self.buckets) + + if self.name in all_gauges.keys(): + logger.warning("%s already registered, reregistering" % (self.name,)) + REGISTRY.unregister(all_gauges.pop(self.name)) + + REGISTRY.register(self) + all_gauges[self.name] = self + + # # Detailed CPU metrics # -class CPUMetrics(object): +class CPUMetrics(object): def __init__(self): ticks_per_sec = 100 try: @@ -237,13 +298,28 @@ gc_time = Histogram( "python_gc_time", "Time taken to GC (sec)", ["gen"], - buckets=[0.0025, 0.005, 0.01, 0.025, 0.05, 0.10, 0.25, 0.50, 1.00, 2.50, - 5.00, 7.50, 15.00, 30.00, 45.00, 60.00], + buckets=[ + 0.0025, + 0.005, + 0.01, + 0.025, + 0.05, + 0.10, + 0.25, + 0.50, + 1.00, + 2.50, + 5.00, + 7.50, + 15.00, + 30.00, + 45.00, + 60.00, + ], ) class GCCounts(object): - def collect(self): cm = GaugeMetricFamily("python_gc_counts", "GC object counts", labels=["gen"]) for n, m in enumerate(gc.get_count()): @@ -279,9 +355,7 @@ sent_transactions_counter = Counter("synapse_federation_client_sent_transactions events_processed_counter = Counter("synapse_federation_client_events_processed", "") event_processing_loop_counter = Counter( - "synapse_event_processing_loop_count", - "Event processing loop iterations", - ["name"], + "synapse_event_processing_loop_count", "Event processing loop iterations", ["name"] ) event_processing_loop_room_count = Counter( @@ -311,7 +385,6 @@ last_ticked = time.time() class ReactorLastSeenMetric(object): - def collect(self): cm = GaugeMetricFamily( "python_twisted_reactor_last_seen", @@ -325,7 +398,6 @@ REGISTRY.register(ReactorLastSeenMetric()) def runUntilCurrentTimer(func): - @functools.wraps(func) def f(*args, **kwargs): now = reactor.seconds() diff --git a/synapse/storage/events.py b/synapse/storage/events.py index f9162be9b9..1578403f79 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -17,7 +17,7 @@ import itertools import logging -from collections import OrderedDict, deque, namedtuple +from collections import Counter as c_counter, OrderedDict, deque, namedtuple from functools import wraps from six import iteritems, text_type @@ -33,6 +33,7 @@ from synapse.api.constants import EventTypes from synapse.api.errors import SynapseError from synapse.events import EventBase # noqa: F401 from synapse.events.snapshot import EventContext # noqa: F401 +from synapse.metrics import BucketCollector from synapse.metrics.background_process_metrics import run_as_background_process from synapse.state import StateResolutionStore from synapse.storage.background_updates import BackgroundUpdateStore @@ -220,13 +221,38 @@ class EventsStore( EventsWorkerStore, BackgroundUpdateStore, ): - def __init__(self, db_conn, hs): super(EventsStore, self).__init__(db_conn, hs) self._event_persist_queue = _EventPeristenceQueue() self._state_resolution_handler = hs.get_state_resolution_handler() + # Collect metrics on the number of forward extremities that exist. + self._current_forward_extremities_amount = {} + + BucketCollector( + "synapse_forward_extremities", + lambda: self._current_forward_extremities_amount, + buckets=[1, 2, 3, 5, 7, 10, 15, 20, 50, 100, 200, 500, "+Inf"] + ) + + # Read the extrems every 60 minutes + hs.get_clock().looping_call(self._read_forward_extremities, 60 * 60 * 1000) + + @defer.inlineCallbacks + def _read_forward_extremities(self): + def fetch(txn): + txn.execute( + """ + select count(*) c from event_forward_extremities + group by room_id + """ + ) + return txn.fetchall() + + res = yield self.runInteraction("read_forward_extremities", fetch) + self._current_forward_extremities_amount = c_counter(list(x[0] for x in res)) + @defer.inlineCallbacks def persist_events(self, events_and_contexts, backfilled=False): """ @@ -568,17 +594,11 @@ class EventsStore( ) txn.execute(sql, batch) - results.extend( - r[0] - for r in txn - if not json.loads(r[1]).get("soft_failed") - ) + results.extend(r[0] for r in txn if not json.loads(r[1]).get("soft_failed")) for chunk in batch_iter(event_ids, 100): yield self.runInteraction( - "_get_events_which_are_prevs", - _get_events_which_are_prevs_txn, - chunk, + "_get_events_which_are_prevs", _get_events_which_are_prevs_txn, chunk ) defer.returnValue(results) @@ -640,9 +660,7 @@ class EventsStore( for chunk in batch_iter(event_ids, 100): yield self.runInteraction( - "_get_prevs_before_rejected", - _get_prevs_before_rejected_txn, - chunk, + "_get_prevs_before_rejected", _get_prevs_before_rejected_txn, chunk ) defer.returnValue(existing_prevs) |