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.
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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):
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self._remove_duplicate_outbound_pokes,
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)
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self.db_pool.updates.register_background_index_update(
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"device_lists_changes_in_room_by_room_index",
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index_name="device_lists_changes_in_room_by_room_idx",
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table="device_lists_changes_in_room",
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columns=["room_id", "stream_id"],
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)
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async def _drop_device_list_streams_non_unique_indexes(
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self, progress: JsonDict, batch_size: int
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) -> int:
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/* Copyright 2022 The Matrix.org Foundation C.I.C
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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-- Adds an index on `device_lists_changes_in_room (room_id, stream_id)`, which
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-- speeds up `/sync` queries.
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INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
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(7313, 'device_lists_changes_in_room_by_room_index', '{}');
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