diff options
| -rw-r--r-- | changelog.d/13569.removal | 1 | ||||
| -rw-r--r-- | synapse/state/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/storage/databases/main/roommember.py | 122 |
3 files changed, 40 insertions, 85 deletions
diff --git a/changelog.d/13569.removal b/changelog.d/13569.removal new file mode 100644 index 0000000000..af9d407671 --- /dev/null +++ b/changelog.d/13569.removal @@ -0,0 +1 @@ +Remove redundant `_get_joined_users_from_context` cache. Contributed by Nick @ Beeper (@fizzadar). diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py index 3047e1b1ad..3787d35b24 100644 --- a/synapse/state/__init__.py +++ b/synapse/state/__init__.py @@ -232,7 +232,7 @@ class StateHandler: logger.debug("calling resolve_state_groups from get_current_user_ids_in_room") entry = await self.resolve_state_groups_for_events(room_id, latest_event_ids) state = await entry.get_state(self._state_storage_controller, StateFilter.all()) - return await self.store.get_joined_user_ids_from_state(room_id, state, entry) + return await self.store.get_joined_user_ids_from_state(room_id, state) async def get_hosts_in_room_at_events( self, room_id: str, event_ids: Collection[str] diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py index 06500457bd..4f0adb136a 100644 --- a/synapse/storage/databases/main/roommember.py +++ b/synapse/storage/databases/main/roommember.py @@ -31,7 +31,6 @@ from typing import ( import attr from synapse.api.constants import EventTypes, Membership -from synapse.events import EventBase from synapse.metrics import LaterGauge from synapse.metrics.background_process_metrics import ( run_as_background_process, @@ -883,96 +882,51 @@ class RoomMemberWorkerStore(EventsWorkerStore): return shared_room_ids or frozenset() async def get_joined_user_ids_from_state( - self, room_id: str, state: StateMap[str], state_entry: "_StateCacheEntry" + self, room_id: str, state: StateMap[str] ) -> Set[str]: - state_group: Union[object, int] = state_entry.state_group - if not state_group: - # If state_group is None it means it has yet to be assigned a - # state group, i.e. we need to make sure that calls with a state_group - # of None don't hit previous cached calls with a None state_group. - # To do this we set the state_group to a new object as object() != object() - state_group = object() - - assert state_group is not None - with Measure(self._clock, "get_joined_users_from_state"): - return await self._get_joined_user_ids_from_context( - room_id, state_group, state, context=state_entry - ) + """ + For a given set of state IDs, get a set of user IDs in the room. - @cached(num_args=2, iterable=True, max_entries=100000) - async def _get_joined_user_ids_from_context( - self, - room_id: str, - state_group: Union[object, int], - current_state_ids: StateMap[str], - event: Optional[EventBase] = None, - context: Optional["_StateCacheEntry"] = None, - ) -> Set[str]: - # We don't use `state_group`, it's there so that we can cache based - # on it. However, it's important that it's never None, since two current_states - # with a state_group of None are likely to be different. - assert state_group is not None + This method checks the local event cache, before calling + `_get_user_ids_from_membership_event_ids` for any uncached events. + """ - users_in_room = set() - member_event_ids = [ - e_id - for key, e_id in current_state_ids.items() - if key[0] == EventTypes.Member - ] - - if context is not None: - # If we have a context with a delta from a previous state group, - # check if we also have the result from the previous group in cache. - # If we do then we can reuse that result and simply update it with - # any membership changes in `delta_ids` - if context.prev_group and context.delta_ids: - prev_res = self._get_joined_user_ids_from_context.cache.get_immediate( - (room_id, context.prev_group), None - ) - if prev_res and isinstance(prev_res, set): - users_in_room = prev_res - member_event_ids = [ - e_id - for key, e_id in context.delta_ids.items() - if key[0] == EventTypes.Member - ] - for etype, state_key in context.delta_ids: - if etype == EventTypes.Member: - users_in_room.discard(state_key) - - # We check if we have any of the member event ids in the event cache - # before we ask the DB - - # We don't update the event cache hit ratio as it completely throws off - # the hit ratio counts. After all, we don't populate the cache if we - # miss it here - event_map = self._get_events_from_local_cache( - member_event_ids, update_metrics=False - ) + with Measure(self._clock, "get_joined_user_ids_from_state"): + users_in_room = set() + member_event_ids = [ + e_id for key, e_id in state.items() if key[0] == EventTypes.Member + ] - missing_member_event_ids = [] - for event_id in member_event_ids: - ev_entry = event_map.get(event_id) - if ev_entry and not ev_entry.event.rejected_reason: - if ev_entry.event.membership == Membership.JOIN: - users_in_room.add(ev_entry.event.state_key) - else: - missing_member_event_ids.append(event_id) + # We check if we have any of the member event ids in the event cache + # before we ask the DB - if missing_member_event_ids: - event_to_memberships = await self._get_user_ids_from_membership_event_ids( - missing_member_event_ids - ) - users_in_room.update( - user_id for user_id in event_to_memberships.values() if user_id + # We don't update the event cache hit ratio as it completely throws off + # the hit ratio counts. After all, we don't populate the cache if we + # miss it here + event_map = self._get_events_from_local_cache( + member_event_ids, update_metrics=False ) - if event is not None and event.type == EventTypes.Member: - if event.membership == Membership.JOIN: - if event.event_id in member_event_ids: - users_in_room.add(event.state_key) + missing_member_event_ids = [] + for event_id in member_event_ids: + ev_entry = event_map.get(event_id) + if ev_entry and not ev_entry.event.rejected_reason: + if ev_entry.event.membership == Membership.JOIN: + users_in_room.add(ev_entry.event.state_key) + else: + missing_member_event_ids.append(event_id) + + if missing_member_event_ids: + event_to_memberships = ( + await self._get_user_ids_from_membership_event_ids( + missing_member_event_ids + ) + ) + users_in_room.update( + user_id for user_id in event_to_memberships.values() if user_id + ) - return users_in_room + return users_in_room @cached( max_entries=10000, @@ -1205,7 +1159,7 @@ class RoomMemberWorkerStore(EventsWorkerStore): # The cache doesn't match the state group or prev state group, # so we calculate the result from first principles. joined_user_ids = await self.get_joined_user_ids_from_state( - room_id, state, state_entry + room_id, state ) cache.hosts_to_joined_users = {} |