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Log which cache is throwing exceptions

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This commit is contained in:
Richard van der Hoff 2018-09-26 12:40:20 +01:00
parent 8ac9fa7375
commit 7ee94fc1ba
1 changed files with 17 additions and 10 deletions
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27
synapse/util/caches/__init__.py
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@ -13,6 +13,7 @@
# See the License for the specific language governing permissions and # See the License for the specific language governing permissions and
# limitations under the License. # limitations under the License.
import logging
import os import os
import six import six
@ -20,6 +21,8 @@ from six.moves import intern
from prometheus_client.core import REGISTRY, Gauge, GaugeMetricFamily from prometheus_client.core import REGISTRY, Gauge, GaugeMetricFamily
logger = logging.getLogger(__name__)
CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.5)) CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.5))
@ -76,16 +79,20 @@ def register_cache(cache_type, cache_name, cache):
return [] return []
def collect(self): def collect(self):
if cache_type == "response_cache": try:
response_cache_size.labels(cache_name).set(len(cache)) if cache_type == "response_cache":
response_cache_hits.labels(cache_name).set(self.hits) response_cache_size.labels(cache_name).set(len(cache))
response_cache_evicted.labels(cache_name).set(self.evicted_size) response_cache_hits.labels(cache_name).set(self.hits)
response_cache_total.labels(cache_name).set(self.hits + self.misses) response_cache_evicted.labels(cache_name).set(self.evicted_size)
else: response_cache_total.labels(cache_name).set(self.hits + self.misses)
cache_size.labels(cache_name).set(len(cache)) else:
cache_hits.labels(cache_name).set(self.hits) cache_size.labels(cache_name).set(len(cache))
cache_evicted.labels(cache_name).set(self.evicted_size) cache_hits.labels(cache_name).set(self.hits)
cache_total.labels(cache_name).set(self.hits + self.misses) cache_evicted.labels(cache_name).set(self.evicted_size)
cache_total.labels(cache_name).set(self.hits + self.misses)
except Exception as e:
logger.warn("Error calculating metrics for %s: %s", cache_name, e)
raise
yield GaugeMetricFamily("__unused", "") yield GaugeMetricFamily("__unused", "")