From 6de09e07a6f7d043589205c25594852900a6626b Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 17 Jul 2019 15:33:37 +0100 Subject: Add membership column to current_state_events table. It turns out that doing a join is surprisingly expensive for the DB to do when room_membership table is larger than the disk cache. --- .../delta/56/current_state_events_membership.sql | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 synapse/storage/schema/delta/56/current_state_events_membership.sql (limited to 'synapse/storage/schema/delta') diff --git a/synapse/storage/schema/delta/56/current_state_events_membership.sql b/synapse/storage/schema/delta/56/current_state_events_membership.sql new file mode 100644 index 0000000000..5c754651cb --- /dev/null +++ b/synapse/storage/schema/delta/56/current_state_events_membership.sql @@ -0,0 +1,19 @@ +/* Copyright 2019 The Matrix.org Foundation C.I.C. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +-- We add membership to current state so that we don't need to join against +-- room_memberships, which can be surprisingly costly (we do such queries +-- very frequently). +ALTER TABLE current_state_events ADD membership TEXT; -- cgit 1.4.1