diff options
| -rw-r--r-- | changelog.d/13573.misc | 1 | ||||
| -rw-r--r-- | synapse/handlers/sync.py | 4 | ||||
| -rw-r--r-- | synapse/state/__init__.py | 13 | ||||
| -rw-r--r-- | synapse/storage/databases/main/roommember.py | 67 | ||||
| -rw-r--r-- | synapse/util/caches/descriptors.py | 26 |
5 files changed, 57 insertions, 54 deletions
diff --git a/changelog.d/13573.misc b/changelog.d/13573.misc new file mode 100644 index 0000000000..1ce9c0c081 --- /dev/null +++ b/changelog.d/13573.misc @@ -0,0 +1 @@ +Cache user IDs instead of profiles to reduce cache memory usage. Contributed by Nick @ Beeper (@fizzadar). diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py index b4d3f3958c..2d95b1fa24 100644 --- a/synapse/handlers/sync.py +++ b/synapse/handlers/sync.py @@ -2421,10 +2421,10 @@ class SyncHandler: joined_room.room_id, joined_room.event_pos.stream ) ) - users_in_room = await self.state.get_current_users_in_room( + user_ids_in_room = await self.state.get_current_user_ids_in_room( joined_room.room_id, extrems ) - if user_id in users_in_room: + if user_id in user_ids_in_room: joined_room_ids.add(joined_room.room_id) return frozenset(joined_room_ids) diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py index c355e4f98a..3047e1b1ad 100644 --- a/synapse/state/__init__.py +++ b/synapse/state/__init__.py @@ -44,7 +44,6 @@ from synapse.logging.context import ContextResourceUsage from synapse.replication.http.state import ReplicationUpdateCurrentStateRestServlet from synapse.state import v1, v2 from synapse.storage.databases.main.events_worker import EventRedactBehaviour -from synapse.storage.roommember import ProfileInfo from synapse.storage.state import StateFilter from synapse.types import StateMap from synapse.util.async_helpers import Linearizer @@ -210,11 +209,11 @@ class StateHandler: ret = await self.resolve_state_groups_for_events(room_id, event_ids) return await ret.get_state(self._state_storage_controller, state_filter) - async def get_current_users_in_room( + async def get_current_user_ids_in_room( self, room_id: str, latest_event_ids: List[str] - ) -> Dict[str, ProfileInfo]: + ) -> Set[str]: """ - Get the users who are currently in a room. + Get the users IDs who are currently in a room. Note: This is much slower than using the equivalent method `DataStore.get_users_in_room` or `DataStore.get_users_in_room_with_profiles`, @@ -225,15 +224,15 @@ class StateHandler: room_id: The ID of the room. latest_event_ids: Precomputed list of latest event IDs. Will be computed if None. Returns: - Dictionary of user IDs to their profileinfo. + Set of user IDs in the room. """ assert latest_event_ids is not None - logger.debug("calling resolve_state_groups from get_current_users_in_room") + 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_users_from_state(room_id, state, entry) + return await self.store.get_joined_user_ids_from_state(room_id, state, entry) 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 827c1f1efd..0eb024a809 100644 --- a/synapse/storage/databases/main/roommember.py +++ b/synapse/storage/databases/main/roommember.py @@ -835,9 +835,9 @@ class RoomMemberWorkerStore(EventsWorkerStore): return shared_room_ids or frozenset() - async def get_joined_users_from_state( + async def get_joined_user_ids_from_state( self, room_id: str, state: StateMap[str], state_entry: "_StateCacheEntry" - ) -> Dict[str, ProfileInfo]: + ) -> 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 @@ -848,25 +848,25 @@ class RoomMemberWorkerStore(EventsWorkerStore): assert state_group is not None with Measure(self._clock, "get_joined_users_from_state"): - return await self._get_joined_users_from_context( + return await self._get_joined_user_ids_from_context( room_id, state_group, state, context=state_entry ) @cached(num_args=2, iterable=True, max_entries=100000) - async def _get_joined_users_from_context( + 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, - ) -> Dict[str, ProfileInfo]: + ) -> 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 - users_in_room = {} + users_in_room = set() member_event_ids = [ e_id for key, e_id in current_state_ids.items() @@ -879,11 +879,11 @@ class RoomMemberWorkerStore(EventsWorkerStore): # 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_users_from_context.cache.get_immediate( + 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, dict): - users_in_room = dict(prev_res) + 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() @@ -891,7 +891,7 @@ class RoomMemberWorkerStore(EventsWorkerStore): ] for etype, state_key in context.delta_ids: if etype == EventTypes.Member: - users_in_room.pop(state_key, None) + 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 @@ -908,42 +908,41 @@ class RoomMemberWorkerStore(EventsWorkerStore): 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[ev_entry.event.state_key] = ProfileInfo( - display_name=ev_entry.event.content.get("displayname", None), - avatar_url=ev_entry.event.content.get("avatar_url", None), - ) + 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_joined_profiles_from_event_ids( + event_to_memberships = await self._get_user_ids_from_membership_event_ids( missing_member_event_ids ) - users_in_room.update(row for row in event_to_memberships.values() if row) + users_in_room.update(event_to_memberships.values()) 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[event.state_key] = ProfileInfo( - display_name=event.content.get("displayname", None), - avatar_url=event.content.get("avatar_url", None), - ) + users_in_room.add(event.state_key) return users_in_room - @cached(max_entries=10000) - def _get_joined_profile_from_event_id( + @cached( + max_entries=10000, + # This name matches the old function that has been replaced - the cache name + # is kept here to maintain backwards compatibility. + name="_get_joined_profile_from_event_id", + ) + def _get_user_id_from_membership_event_id( self, event_id: str ) -> Optional[Tuple[str, ProfileInfo]]: raise NotImplementedError() @cachedList( - cached_method_name="_get_joined_profile_from_event_id", + cached_method_name="_get_user_id_from_membership_event_id", list_name="event_ids", ) - async def _get_joined_profiles_from_event_ids( + async def _get_user_ids_from_membership_event_ids( self, event_ids: Iterable[str] - ) -> Dict[str, Optional[Tuple[str, ProfileInfo]]]: + ) -> Dict[str, str]: """For given set of member event_ids check if they point to a join event and if so return the associated user and profile info. @@ -958,21 +957,13 @@ class RoomMemberWorkerStore(EventsWorkerStore): table="room_memberships", column="event_id", iterable=event_ids, - retcols=("user_id", "display_name", "avatar_url", "event_id"), + retcols=("user_id", "event_id"), keyvalues={"membership": Membership.JOIN}, batch_size=1000, - desc="_get_joined_profiles_from_event_ids", + desc="_get_user_ids_from_membership_event_ids", ) - return { - row["event_id"]: ( - row["user_id"], - ProfileInfo( - avatar_url=row["avatar_url"], display_name=row["display_name"] - ), - ) - for row in rows - } + return {row["event_id"]: row["user_id"] for row in rows} @cached(max_entries=10000) async def is_host_joined(self, room_id: str, host: str) -> bool: @@ -1131,12 +1122,12 @@ class RoomMemberWorkerStore(EventsWorkerStore): else: # The cache doesn't match the state group or prev state group, # so we calculate the result from first principles. - joined_users = await self.get_joined_users_from_state( + joined_user_ids = await self.get_joined_user_ids_from_state( room_id, state, state_entry ) cache.hosts_to_joined_users = {} - for user_id in joined_users: + for user_id in joined_user_ids: host = intern_string(get_domain_from_id(user_id)) cache.hosts_to_joined_users.setdefault(host, set()).add(user_id) diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py index 867f315b2a..9d4bc89edb 100644 --- a/synapse/util/caches/descriptors.py +++ b/synapse/util/caches/descriptors.py @@ -73,8 +73,10 @@ class _CacheDescriptorBase: num_args: Optional[int], uncached_args: Optional[Collection[str]] = None, cache_context: bool = False, + name: Optional[str] = None, ): self.orig = orig + self.name = name or orig.__name__ arg_spec = inspect.getfullargspec(orig) all_args = arg_spec.args @@ -211,7 +213,7 @@ class LruCacheDescriptor(_CacheDescriptorBase): def __get__(self, obj: Optional[Any], owner: Optional[Type]) -> Callable[..., Any]: cache: LruCache[CacheKey, Any] = LruCache( - cache_name=self.orig.__name__, + cache_name=self.name, max_size=self.max_entries, ) @@ -241,7 +243,7 @@ class LruCacheDescriptor(_CacheDescriptorBase): wrapped = cast(_CachedFunction, _wrapped) wrapped.cache = cache - obj.__dict__[self.orig.__name__] = wrapped + obj.__dict__[self.name] = wrapped return wrapped @@ -301,12 +303,14 @@ class DeferredCacheDescriptor(_CacheDescriptorBase): cache_context: bool = False, iterable: bool = False, prune_unread_entries: bool = True, + name: Optional[str] = None, ): super().__init__( orig, num_args=num_args, uncached_args=uncached_args, cache_context=cache_context, + name=name, ) if tree and self.num_args < 2: @@ -321,7 +325,7 @@ class DeferredCacheDescriptor(_CacheDescriptorBase): def __get__(self, obj: Optional[Any], owner: Optional[Type]) -> Callable[..., Any]: cache: DeferredCache[CacheKey, Any] = DeferredCache( - name=self.orig.__name__, + name=self.name, max_entries=self.max_entries, tree=self.tree, iterable=self.iterable, @@ -372,7 +376,7 @@ class DeferredCacheDescriptor(_CacheDescriptorBase): wrapped.cache = cache wrapped.num_args = self.num_args - obj.__dict__[self.orig.__name__] = wrapped + obj.__dict__[self.name] = wrapped return wrapped @@ -393,6 +397,7 @@ class DeferredCacheListDescriptor(_CacheDescriptorBase): cached_method_name: str, list_name: str, num_args: Optional[int] = None, + name: Optional[str] = None, ): """ Args: @@ -403,7 +408,7 @@ class DeferredCacheListDescriptor(_CacheDescriptorBase): but including list_name) to use as cache keys. Defaults to all named args of the function. """ - super().__init__(orig, num_args=num_args, uncached_args=None) + super().__init__(orig, num_args=num_args, uncached_args=None, name=name) self.list_name = list_name @@ -525,7 +530,7 @@ class DeferredCacheListDescriptor(_CacheDescriptorBase): else: return defer.succeed(results) - obj.__dict__[self.orig.__name__] = wrapped + obj.__dict__[self.name] = wrapped return wrapped @@ -577,6 +582,7 @@ def cached( cache_context: bool = False, iterable: bool = False, prune_unread_entries: bool = True, + name: Optional[str] = None, ) -> Callable[[F], _CachedFunction[F]]: func = lambda orig: DeferredCacheDescriptor( orig, @@ -587,13 +593,18 @@ def cached( cache_context=cache_context, iterable=iterable, prune_unread_entries=prune_unread_entries, + name=name, ) return cast(Callable[[F], _CachedFunction[F]], func) def cachedList( - *, cached_method_name: str, list_name: str, num_args: Optional[int] = None + *, + cached_method_name: str, + list_name: str, + num_args: Optional[int] = None, + name: Optional[str] = None, ) -> Callable[[F], _CachedFunction[F]]: """Creates a descriptor that wraps a function in a `DeferredCacheListDescriptor`. @@ -628,6 +639,7 @@ def cachedList( cached_method_name=cached_method_name, list_name=list_name, num_args=num_args, + name=name, ) return cast(Callable[[F], _CachedFunction[F]], func) |