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Fix incredubly slow back pagination query

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If a client didn't specify a from token when paginating backwards
synapse would attempt to query the (global) maximum topological token.
This a) doesn't make much sense since they're room specific and b) there
are no indices that lets postgres do this efficiently.
This commit is contained in:
Erik Johnston 2016-10-24 13:35:51 +01:00
parent a842fed418
commit d04e2ff3a4
4 changed files with 48 additions and 12 deletions
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4
synapse/handlers/message.py
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@ -82,8 +82,8 @@ class MessageHandler(BaseHandler):
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token(
direction='b'
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id
)
)
room_token = pagin_config.from_token.room_key

7
synapse/handlers/room.py
View file

@ -475,8 +475,11 @@ class RoomEventSource(object):
defer.returnValue((events, end_key))
def get_current_key(self, direction='f'):
return self.store.get_room_events_max_id(direction)
def get_current_key(self):
return self.store.get_room_events_max_id()
def get_current_key_for_room(self, room_id):
return self.store.get_room_events_max_id(room_id)
@defer.inlineCallbacks
def get_pagination_rows(self, user, config, key):