Invalidate the get_users_in_room{_with_profile} caches only when necessary. (#11878)

The get_users_in_room and get_users_in_room_with_profiles
are now only invalidated when the  membership of a room changes,
instead of during any state change in the room.
This commit is contained in:
Patrick Cloke 2022-02-02 12:24:07 -05:00 committed by GitHub
parent 41818cda1f
commit a8da046907
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3 changed files with 20 additions and 8 deletions

1
changelog.d/11878.misc Normal file
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@ -0,0 +1 @@
Do not needlessly clear the `get_users_in_room` and `get_users_in_room_with_profiles` caches when any room state changes.

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@ -57,7 +57,7 @@ class SQLBaseStore(metaclass=ABCMeta):
pass
def _invalidate_state_caches(
self, room_id: str, members_changed: Iterable[str]
self, room_id: str, members_changed: Collection[str]
) -> None:
"""Invalidates caches that are based on the current state, but does
not stream invalidations down replication.
@ -66,11 +66,16 @@ class SQLBaseStore(metaclass=ABCMeta):
room_id: Room where state changed
members_changed: The user_ids of members that have changed
"""
# If there were any membership changes, purge the appropriate caches.
for host in {get_domain_from_id(u) for u in members_changed}:
self._attempt_to_invalidate_cache("is_host_joined", (room_id, host))
if members_changed:
self._attempt_to_invalidate_cache("get_users_in_room", (room_id,))
self._attempt_to_invalidate_cache("get_users_in_room_with_profiles", (room_id,))
self._attempt_to_invalidate_cache(
"get_users_in_room_with_profiles", (room_id,)
)
# Purge other caches based on room state.
self._attempt_to_invalidate_cache("get_room_summary", (room_id,))
self._attempt_to_invalidate_cache("get_current_state_ids", (room_id,))

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@ -15,7 +15,7 @@
import itertools
import logging
from typing import TYPE_CHECKING, Any, Iterable, List, Optional, Tuple
from typing import TYPE_CHECKING, Any, Collection, Iterable, List, Optional, Tuple
from synapse.api.constants import EventTypes
from synapse.replication.tcp.streams import BackfillStream, CachesStream
@ -25,7 +25,11 @@ from synapse.replication.tcp.streams.events import (
EventsStreamEventRow,
)
from synapse.storage._base import SQLBaseStore
from synapse.storage.database import DatabasePool, LoggingDatabaseConnection
from synapse.storage.database import (
DatabasePool,
LoggingDatabaseConnection,
LoggingTransaction,
)
from synapse.storage.engines import PostgresEngine
from synapse.util.iterutils import batch_iter
@ -236,7 +240,9 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
txn.call_after(cache_func.invalidate_all)
self._send_invalidation_to_replication(txn, cache_func.__name__, None)
def _invalidate_state_caches_and_stream(self, txn, room_id, members_changed):
def _invalidate_state_caches_and_stream(
self, txn: LoggingTransaction, room_id: str, members_changed: Collection[str]
) -> None:
"""Special case invalidation of caches based on current state.
We special case this so that we can batch the cache invalidations into a
@ -244,8 +250,8 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
Args:
txn
room_id (str): Room where state changed
members_changed (iterable[str]): The user_ids of members that have changed
room_id: Room where state changed
members_changed: The user_ids of members that have changed
"""
txn.call_after(self._invalidate_state_caches, room_id, members_changed)