diff options
| -rw-r--r-- | synapse/metrics/__init__.py | 16 | ||||
| -rw-r--r-- | synapse/metrics/metric.py | 44 | ||||
| -rw-r--r-- | synapse/util/caches/__init__.py | 20 | ||||
| -rw-r--r-- | synapse/util/caches/descriptors.py | 17 | ||||
| -rw-r--r-- | synapse/util/caches/dictionary_cache.py | 8 | ||||
| -rw-r--r-- | synapse/util/caches/expiringcache.py | 8 | ||||
| -rw-r--r-- | synapse/util/caches/stream_change_cache.py | 16 | ||||
| -rw-r--r-- | tests/metrics/test_metric.py | 23 |
8 files changed, 82 insertions, 70 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index 5664d5a381..c38f24485a 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -33,11 +33,7 @@ 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): @@ -53,7 +49,7 @@ 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): @@ -84,12 +80,12 @@ 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), + ] diff --git a/synapse/util/caches/__init__.py b/synapse/util/caches/__init__.py index d53569ca49..ebd715c5dc 100644 --- a/synapse/util/caches/__init__.py +++ b/synapse/util/caches/__init__.py @@ -24,11 +24,21 @@ DEBUG_CACHES = False metrics = synapse.metrics.get_metrics_for("synapse.util.caches") caches_by_name = {} -cache_counter = metrics.register_cache( - "cache", - lambda: {(name,): len(caches_by_name[name]) for name in caches_by_name.keys()}, - labels=["name"], -) +# cache_counter = metrics.register_cache( +# "cache", +# lambda: {(name,): len(caches_by_name[name]) for name in caches_by_name.keys()}, +# labels=["name"], +# ) + + +def register_cache(name, cache): + caches_by_name[name] = cache + return metrics.register_cache( + "cache", + lambda: len(cache), + name, + ) + _string_cache = LruCache(int(5000 * CACHE_SIZE_FACTOR)) caches_by_name["string_cache"] = _string_cache diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 758f5982b0..5d25c9e762 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -22,7 +22,7 @@ from synapse.util.logcontext import ( PreserveLoggingContext, preserve_context_over_deferred, preserve_context_over_fn ) -from . import caches_by_name, DEBUG_CACHES, cache_counter +from . import DEBUG_CACHES, register_cache from twisted.internet import defer @@ -43,6 +43,15 @@ CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1)) class Cache(object): + __slots__ = ( + "cache", + "max_entries", + "name", + "keylen", + "sequence", + "thread", + "metrics", + ) def __init__(self, name, max_entries=1000, keylen=1, lru=True, tree=False): if lru: @@ -59,7 +68,7 @@ class Cache(object): self.keylen = keylen self.sequence = 0 self.thread = None - caches_by_name[name] = self.cache + self.metrics = register_cache(name, self.cache) def check_thread(self): expected_thread = self.thread @@ -74,10 +83,10 @@ class Cache(object): def get(self, key, default=_CacheSentinel): val = self.cache.get(key, _CacheSentinel) if val is not _CacheSentinel: - cache_counter.inc_hits(self.name) + self.metrics.inc_hits() return val - cache_counter.inc_misses(self.name) + self.metrics.inc_misses() if default is _CacheSentinel: raise KeyError() diff --git a/synapse/util/caches/dictionary_cache.py b/synapse/util/caches/dictionary_cache.py index f92d80542b..b0ca1bb79d 100644 --- a/synapse/util/caches/dictionary_cache.py +++ b/synapse/util/caches/dictionary_cache.py @@ -15,7 +15,7 @@ from synapse.util.caches.lrucache import LruCache from collections import namedtuple -from . import caches_by_name, cache_counter +from . import register_cache import threading import logging @@ -43,7 +43,7 @@ class DictionaryCache(object): __slots__ = [] self.sentinel = Sentinel() - caches_by_name[name] = self.cache + self.metrics = register_cache(name, self.cache) def check_thread(self): expected_thread = self.thread @@ -58,7 +58,7 @@ class DictionaryCache(object): def get(self, key, dict_keys=None): entry = self.cache.get(key, self.sentinel) if entry is not self.sentinel: - cache_counter.inc_hits(self.name) + self.metrics.inc_hits() if dict_keys is None: return DictionaryEntry(entry.full, dict(entry.value)) @@ -69,7 +69,7 @@ class DictionaryCache(object): if k in entry.value }) - cache_counter.inc_misses(self.name) + self.metrics.inc_misses() return DictionaryEntry(False, {}) def invalidate(self, key): diff --git a/synapse/util/caches/expiringcache.py b/synapse/util/caches/expiringcache.py index 2b68c1ac93..080388958f 100644 --- a/synapse/util/caches/expiringcache.py +++ b/synapse/util/caches/expiringcache.py @@ -13,7 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. -from synapse.util.caches import cache_counter, caches_by_name +from synapse.util.caches import register_cache import logging @@ -49,7 +49,7 @@ class ExpiringCache(object): self._cache = {} - caches_by_name[cache_name] = self._cache + self.metrics = register_cache(cache_name, self._cache) def start(self): if not self._expiry_ms: @@ -78,9 +78,9 @@ class ExpiringCache(object): def __getitem__(self, key): try: entry = self._cache[key] - cache_counter.inc_hits(self._cache_name) + self.metrics.inc_hits() except KeyError: - cache_counter.inc_misses(self._cache_name) + self.metrics.inc_misses() raise if self._reset_expiry_on_get: diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py index ea8a74ca69..3c051dabc4 100644 --- a/synapse/util/caches/stream_change_cache.py +++ b/synapse/util/caches/stream_change_cache.py @@ -13,7 +13,7 @@ # See the License for the specific language governing permissions and # limitations under the License. -from synapse.util.caches import cache_counter, caches_by_name +from synapse.util.caches import register_cache from blist import sorteddict @@ -42,7 +42,7 @@ class StreamChangeCache(object): self._cache = sorteddict() self._earliest_known_stream_pos = current_stream_pos self.name = name - caches_by_name[self.name] = self._cache + self.metrics = register_cache(self.name, self._cache) for entity, stream_pos in prefilled_cache.items(): self.entity_has_changed(entity, stream_pos) @@ -53,19 +53,19 @@ class StreamChangeCache(object): assert type(stream_pos) is int if stream_pos < self._earliest_known_stream_pos: - cache_counter.inc_misses(self.name) + self.metrics.inc_misses() return True latest_entity_change_pos = self._entity_to_key.get(entity, None) if latest_entity_change_pos is None: - cache_counter.inc_hits(self.name) + self.metrics.inc_hits() return False if stream_pos < latest_entity_change_pos: - cache_counter.inc_misses(self.name) + self.metrics.inc_misses() return True - cache_counter.inc_hits(self.name) + self.metrics.inc_hits() return False def get_entities_changed(self, entities, stream_pos): @@ -82,10 +82,10 @@ class StreamChangeCache(object): self._cache[k] for k in keys[i:] ).intersection(entities) - cache_counter.inc_hits(self.name) + self.metrics.inc_hits() else: result = entities - cache_counter.inc_misses(self.name) + self.metrics.inc_misses() return result diff --git a/tests/metrics/test_metric.py b/tests/metrics/test_metric.py index f3c1927ce1..f85455a5af 100644 --- a/tests/metrics/test_metric.py +++ b/tests/metrics/test_metric.py @@ -61,9 +61,6 @@ class CounterMetricTestCase(unittest.TestCase): 'vector{method="PUT"} 1', ]) - # Check that passing too few values errors - self.assertRaises(ValueError, counter.inc) - class CallbackMetricTestCase(unittest.TestCase): @@ -138,27 +135,27 @@ class CacheMetricTestCase(unittest.TestCase): def test_cache(self): d = dict() - metric = CacheMetric("cache", lambda: len(d)) + metric = CacheMetric("cache", lambda: len(d), "cache_name") self.assertEquals(metric.render(), [ - 'cache:hits 0', - 'cache:total 0', - 'cache:size 0', + 'cache:hits{name="cache_name"} 0', + 'cache:total{name="cache_name"} 0', + 'cache:size{name="cache_name"} 0', ]) metric.inc_misses() d["key"] = "value" self.assertEquals(metric.render(), [ - 'cache:hits 0', - 'cache:total 1', - 'cache:size 1', + 'cache:hits{name="cache_name"} 0', + 'cache:total{name="cache_name"} 1', + 'cache:size{name="cache_name"} 1', ]) metric.inc_hits() self.assertEquals(metric.render(), [ - 'cache:hits 1', - 'cache:total 2', - 'cache:size 1', + 'cache:hits{name="cache_name"} 1', + 'cache:total{name="cache_name"} 2', + 'cache:size{name="cache_name"} 1', ]) |