Matrix-Mirrors/anonymousland-synapse
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse.git synced 2024-12-26 01:49:23 -05:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #3005 from matrix-org/erikj/fix_cache_size

Browse Source 
Fix bug where state cache used lots of memory
This commit is contained in:
Erik Johnston 2018-03-19 11:44:26 +00:00 committed by GitHub
commit 3f961e638a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
synapse/util/caches/dictionary_cache.py
View File

@ -132,9 +132,13 @@ class DictionaryCache(object):
self._update_or_insert(key, value, known_absent)
def _update_or_insert(self, key, value, known_absent):
entry = self.cache.setdefault(key, DictionaryEntry(False, set(), {}))
# We pop and reinsert as we need to tell the cache the size may have
# changed
entry = self.cache.pop(key, DictionaryEntry(False, set(), {}))
entry.value.update(value)
entry.known_absent.update(known_absent)
self.cache[key] = entry
def _insert(self, key, value, known_absent):
self.cache[key] = DictionaryEntry(True, known_absent, value)

15
synapse/util/caches/lrucache.py
View File

@ -154,14 +154,21 @@ class LruCache(object):
def cache_set(key, value, callbacks=[]):
node = cache.get(key, None)
if node is not None:
if value != node.value:
# We sometimes store large objects, e.g. dicts, which cause
# the inequality check to take a long time. So let's only do
# the check if we have some callbacks to call.
if node.callbacks and value != node.value:
for cb in node.callbacks:
cb()
node.callbacks.clear()
if size_callback:
cached_cache_len[0] -= size_callback(node.value)
cached_cache_len[0] += size_callback(value)
# We don't bother to protect this by value != node.value as
# generally size_callback will be cheap compared with equality
# checks. (For example, taking the size of two dicts is quicker
# than comparing them for equality.)
if size_callback:
cached_cache_len[0] -= size_callback(node.value)
cached_cache_len[0] += size_callback(value)
node.callbacks.update(callbacks)