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Fixed removal of new presence stream states (#10014)

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Fixes: https://github.com/matrix-org/synapse/issues/9962

This is a fix for above problem.

I fixed it by swaping the order of insertion of new records and deletion of old ones. This ensures that we don't delete fresh database records as we do deletes before inserts.

Signed-off-by: Marek Matys <themarcq@gmail.com>
This commit is contained in:
Marek Matys 2021-05-21 13:02:06 +02:00 committed by GitHub
parent 7958eadcd1
commit 6a8643ff3d
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2 changed files with 10 additions and 9 deletions
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1
changelog.d/10014.bugfix Normal file
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@ -0,0 +1 @@
Fixed deletion of new presence stream states from database.

18
synapse/storage/databases/main/presence.py
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@ -97,6 +97,15 @@ class PresenceStore(SQLBaseStore):
)
txn.call_after(self._get_presence_for_user.invalidate, (state.user_id,))
# Delete old rows to stop database from getting really big
sql = "DELETE FROM presence_stream WHERE stream_id < ? AND "
for states in batch_iter(presence_states, 50):
clause, args = make_in_list_sql_clause(
self.database_engine, "user_id", [s.user_id for s in states]
)
txn.execute(sql + clause, [stream_id] + list(args))
# Actually insert new rows
self.db_pool.simple_insert_many_txn(
txn,
@ -117,15 +126,6 @@ class PresenceStore(SQLBaseStore):
],
)
# Delete old rows to stop database from getting really big
sql = "DELETE FROM presence_stream WHERE stream_id < ? AND "
for states in batch_iter(presence_states, 50):
clause, args = make_in_list_sql_clause(
self.database_engine, "user_id", [s.user_id for s in states]
)
txn.execute(sql + clause, [stream_id] + list(args))
async def get_all_presence_updates(
self, instance_name: str, last_id: int, current_id: int, limit: int
) -> Tuple[List[Tuple[int, list]], int, bool]: