Add another index to device_lists_changes_in_room (#14534)

This helps avoid reading unnecessarily large amounts of data from the
table when querying with a set of room IDs.
This commit is contained in:
Erik Johnston 2022-11-23 14:09:00 +00:00 committed by GitHub
parent 4ae967cf63
commit f38d7d79c8
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3 changed files with 28 additions and 0 deletions

1
changelog.d/14534.misc Normal file
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Improve DB performance by reducing amount of data that gets read in `device_lists_changes_in_room`.

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@ -1441,6 +1441,13 @@ class DeviceBackgroundUpdateStore(SQLBaseStore):
self._remove_duplicate_outbound_pokes,
)
self.db_pool.updates.register_background_index_update(
"device_lists_changes_in_room_by_room_index",
index_name="device_lists_changes_in_room_by_room_idx",
table="device_lists_changes_in_room",
columns=["room_id", "stream_id"],
)
async def _drop_device_list_streams_non_unique_indexes(
self, progress: JsonDict, batch_size: int
) -> int:

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@ -0,0 +1,20 @@
/* Copyright 2022 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.
*/
-- Adds an index on `device_lists_changes_in_room (room_id, stream_id)`, which
-- speeds up `/sync` queries.
INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
(7313, 'device_lists_changes_in_room_by_room_index', '{}');