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Batch cache invalidation over replication

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Currently whenever the current state changes in a room invalidate a lot
of caches, which cause *a lot* of traffic over replication. Instead,
lets batch up all those invalidations and send a single poke down
the replication streams.

Hopefully this will reduce load on the master process by substantially
reducing traffic.
This commit is contained in:
Erik Johnston 2019-02-18 17:53:31 +00:00
parent d154f5a055
commit a9b5ea6fc1
3 changed files with 69 additions and 32 deletions
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25
synapse/storage/events.py
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@ -979,30 +979,7 @@ class EventsStore(StateGroupWorkerStore, EventFederationStore, EventsWorkerStore
if ev_type == EventTypes.Member
)
for member in members_changed:
self._invalidate_cache_and_stream(
txn, self.get_rooms_for_user_with_stream_ordering, (member,)
)
for host in set(get_domain_from_id(u) for u in members_changed):
self._invalidate_cache_and_stream(
txn, self.is_host_joined, (room_id, host)
)
self._invalidate_cache_and_stream(
txn, self.was_host_joined, (room_id, host)
)
self._invalidate_cache_and_stream(
txn, self.get_users_in_room, (room_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_room_summary, (room_id,)
)
self._invalidate_cache_and_stream(
txn, self.get_current_state_ids, (room_id,)
)
self._invalidate_state_caches_and_stream(txn, room_id, members_changed)
def _update_forward_extremities_txn(self, txn, new_forward_extremities,
max_stream_order):