Only invalidate membership caches based on the cache stream

Before we completely invalidated get_users_in_room whenever we updated
any current_state_events table. This was way too aggressive.

1 files changed, 0 insertions, 20 deletions

diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index 6685b9da1c..f4352b326b 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -572,14 +572,6 @@ class EventsStore(SQLBaseStore):
                     txn, self.get_users_in_room, (room_id,)
                 )
 
-                # Add an entry to the current_state_resets table to record the point
-                # where we clobbered the current state
-                self._simple_insert_txn(
-                    txn,
-                    table="current_state_resets",
-                    values={"event_stream_ordering": max_stream_order}
-                )
-
         for room_id, new_extrem in new_forward_extremeties.items():
             self._simple_delete_txn(
                 txn,
@@ -1611,15 +1603,6 @@ class EventsStore(SQLBaseStore):
                     upper_bound = current_forward_id
 
                 sql = (
-                    "SELECT event_stream_ordering FROM current_state_resets"
-                    " WHERE ? < event_stream_ordering"
-                    " AND event_stream_ordering <= ?"
-                    " ORDER BY event_stream_ordering ASC"
-                )
-                txn.execute(sql, (last_forward_id, upper_bound))
-                state_resets = txn.fetchall()
-
-                sql = (
                     "SELECT event_stream_ordering, event_id, state_group"
                     " FROM ex_outlier_stream"
                     " WHERE ? > event_stream_ordering"
@@ -1630,7 +1613,6 @@ class EventsStore(SQLBaseStore):
                 forward_ex_outliers = txn.fetchall()
             else:
                 new_forward_events = []
-                state_resets = []
                 forward_ex_outliers = []
 
             sql = (
@@ -1670,7 +1652,6 @@ class EventsStore(SQLBaseStore):
             return AllNewEventsResult(
                 new_forward_events, new_backfill_events,
                 forward_ex_outliers, backward_ex_outliers,
-                state_resets,
             )
         return self.runInteraction("get_all_new_events", get_all_new_events_txn)
 
@@ -1896,5 +1877,4 @@ class EventsStore(SQLBaseStore):
 AllNewEventsResult = namedtuple("AllNewEventsResult", [
     "new_forward_events", "new_backfill_events",
     "forward_ex_outliers", "backward_ex_outliers",
-    "state_resets"
 ])