Merge pull request #795 from matrix-org/dbkr/delete_push_actions_after_a_month

Only delete push actions after 30 days
This commit is contained in:
David Baker 2016-05-24 16:22:13 +01:00
commit 209ba4d024
4 changed files with 94 additions and 7 deletions

View File

@ -88,6 +88,7 @@ class DataStore(RoomMemberStore, RoomStore,
def __init__(self, db_conn, hs):
self.hs = hs
self._clock = hs.get_clock()
self.database_engine = hs.database_engine
self.client_ip_last_seen = Cache(
@ -173,6 +174,14 @@ class DataStore(RoomMemberStore, RoomStore,
prefilled_cache=push_rules_prefill,
)
cur = db_conn.cursor()
self._find_stream_orderings_for_times_txn(cur)
cur.close()
self.find_stream_orderings_looping_call = self._clock.looping_call(
self._find_stream_orderings_for_times, 60 * 60 * 1000
)
super(DataStore, self).__init__(hs)
def take_presence_startup_info(self):

View File

@ -153,7 +153,6 @@ class SQLBaseStore(object):
def __init__(self, hs):
self.hs = hs
self._db_pool = hs.get_db_pool()
self._clock = hs.get_clock()
self._previous_txn_total_time = 0
self._current_txn_total_time = 0

View File

@ -24,6 +24,10 @@ logger = logging.getLogger(__name__)
class EventPushActionsStore(SQLBaseStore):
def __init__(self, hs):
self.stream_ordering_month_ago = None
super(EventPushActionsStore, self).__init__(hs)
def _set_push_actions_for_event_and_users_txn(self, txn, event, tuples):
"""
Args:
@ -224,18 +228,93 @@ class EventPushActionsStore(SQLBaseStore):
(room_id, event_id)
)
def _remove_push_actions_before_txn(self, txn, room_id, user_id,
def _remove_old_push_actions_before_txn(self, txn, room_id, user_id,
topological_ordering):
"""
Purges old, stale push actions for a user and room before a given
topological_ordering
Args:
txn: The transcation
room_id: Room ID to delete from
user_id: user ID to delete for
topological_ordering: The lowest topological ordering which will
not be deleted.
"""
txn.call_after(
self.get_unread_event_push_actions_by_room_for_user.invalidate_many,
(room_id, user_id, )
)
# We need to join on the events table to get the received_ts for
# event_push_actions and sqlite won't let us use a join in a delete so
# we can't just delete where received_ts < x. Furthermore we can
# only identify event_push_actions by a tuple of room_id, event_id
# we we can't use a subquery.
# Instead, we look up the stream ordering for the last event in that
# room received before the threshold time and delete event_push_actions
# in the room with a stream_odering before that.
txn.execute(
"DELETE FROM event_push_actions"
" WHERE room_id = ? AND user_id = ? AND topological_ordering < ?",
(room_id, user_id, topological_ordering,)
"DELETE FROM event_push_actions "
" WHERE user_id = ? AND room_id = ? AND "
" topological_ordering < ? AND stream_ordering < ?",
(user_id, room_id, topological_ordering, self.stream_ordering_month_ago)
)
@defer.inlineCallbacks
def _find_stream_orderings_for_times(self):
yield self.runInteraction(
"_find_stream_orderings_for_times",
self._find_stream_orderings_for_times_txn
)
def _find_stream_orderings_for_times_txn(self, txn):
logger.info("Searching for stream ordering 1 month ago")
self.stream_ordering_month_ago = self._find_first_stream_ordering_after_ts_txn(
txn, self._clock.time_msec() - 30 * 24 * 60 * 60 * 1000
)
logger.info(
"Found stream ordering 1 month ago: it's %d",
self.stream_ordering_month_ago
)
def _find_first_stream_ordering_after_ts_txn(self, txn, ts):
"""
Find the stream_ordering of the first event that was received after
a given timestamp. This is relatively slow as there is no index on
received_ts but we can then use this to delete push actions before
this.
received_ts must necessarily be in the same order as stream_ordering
and stream_ordering is indexed, so we manually binary search using
stream_ordering
"""
txn.execute("SELECT MAX(stream_ordering) FROM events")
max_stream_ordering = txn.fetchone()[0]
if max_stream_ordering is None:
return 0
range_start = 0
range_end = max_stream_ordering
sql = (
"SELECT received_ts FROM events"
" WHERE stream_ordering > ?"
" ORDER BY stream_ordering"
" LIMIT 1"
)
while range_end - range_start > 1:
middle = int((range_end + range_start) / 2)
txn.execute(sql, (middle,))
middle_ts = txn.fetchone()[0]
if ts > middle_ts:
range_start = middle
else:
range_end = middle
return range_end
def _action_has_highlight(actions):
for action in actions:

View File

@ -297,7 +297,7 @@ class ReceiptsStore(SQLBaseStore):
)
if receipt_type == "m.read" and topological_ordering:
self._remove_push_actions_before_txn(
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,