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Don't update event cache hit ratio from get_joined_users

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Otherwise the hit ration of plain get_events gets completely skewed by
calls to get_joined_users* functions.
This commit is contained in:
Erik Johnston 2017-05-08 16:06:17 +01:00
parent dcabef952c
commit ffad4fe35b
3 changed files with 21 additions and 5 deletions
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9
synapse/util/caches/descriptors.py
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@ -96,7 +96,7 @@ class Cache(object):
"Cache objects can only be accessed from the main thread"
)
def get(self, key, default=_CacheSentinel, callback=None):
def get(self, key, default=_CacheSentinel, callback=None, update_metrics=True):
"""Looks the key up in the caches.
Args:
@ -104,6 +104,7 @@ class Cache(object):
default: What is returned if key is not in the caches. If not
specified then function throws KeyError instead
callback(fn): Gets called when the entry in the cache is invalidated
update_metrics (bool): whether to update the cache hit rate metrics
Returns:
Either a Deferred or the raw result
@ -113,7 +114,8 @@ class Cache(object):
if val is not _CacheSentinel:
if val.sequence == self.sequence:
val.callbacks.update(callbacks)
self.metrics.inc_hits()
if update_metrics:
self.metrics.inc_hits()
return val.deferred
val = self.cache.get(key, _CacheSentinel, callbacks=callbacks)
@ -121,7 +123,8 @@ class Cache(object):
self.metrics.inc_hits()
return val
self.metrics.inc_misses()
if update_metrics:
self.metrics.inc_misses()
if default is _CacheSentinel:
raise KeyError()