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https://github.com/element-hq/synapse
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Optimise event_search in postgres
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parent
02a27a6c4f
commit
c877f0f034
3 changed files with 137 additions and 5 deletions
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@ -169,20 +169,28 @@ class RoomStore(SQLBaseStore):
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def _store_event_search_txn(self, txn, event, key, value):
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if isinstance(self.database_engine, PostgresEngine):
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sql = (
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"INSERT INTO event_search (event_id, room_id, key, vector)"
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" VALUES (?,?,?,to_tsvector('english', ?))"
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"INSERT INTO event_search"
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" (event_id, room_id, key, vector, stream_ordering, origin_server_ts)"
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" VALUES (?,?,?,to_tsvector('english', ?),?,?)"
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)
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txn.execute(
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sql,
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(
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event.event_id, event.room_id, key, value,
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event.internal_metadata.stream_ordering,
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event.origin_server_ts,
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)
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)
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elif isinstance(self.database_engine, Sqlite3Engine):
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sql = (
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"INSERT INTO event_search (event_id, room_id, key, value)"
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" VALUES (?,?,?,?)"
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)
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txn.execute(sql, (event.event_id, event.room_id, key, value,))
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else:
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# This should be unreachable.
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raise Exception("Unrecognized database engine")
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txn.execute(sql, (event.event_id, event.room_id, key, value,))
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@cachedInlineCallbacks()
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def get_room_name_and_aliases(self, room_id):
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def f(txn):
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65
synapse/storage/schema/delta/31/search_update.py
Normal file
65
synapse/storage/schema/delta/31/search_update.py
Normal file
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@ -0,0 +1,65 @@
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# Copyright 2016 OpenMarket Ltd
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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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from synapse.storage.engines import PostgresEngine
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from synapse.storage.prepare_database import get_statements
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import logging
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import ujson
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logger = logging.getLogger(__name__)
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ALTER_TABLE = """
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ALTER TABLE event_search ADD COLUMN origin_server_ts BIGINT;
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ALTER TABLE event_search ADD COLUMN stream_ordering BIGINT;
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CREATE INDEX event_search_room_order ON event_search(
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room_id, origin_server_ts, stream_ordering
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);
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CREATE INDEX event_search_order ON event_search(origin_server_ts, stream_ordering);
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"""
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def run_create(cur, database_engine, *args, **kwargs):
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if not isinstance(database_engine, PostgresEngine):
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return
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for statement in get_statements(ALTER_TABLE.splitlines()):
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cur.execute(statement)
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cur.execute("SELECT MIN(stream_ordering) FROM events")
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rows = cur.fetchall()
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min_stream_id = rows[0][0]
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cur.execute("SELECT MAX(stream_ordering) FROM events")
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rows = cur.fetchall()
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max_stream_id = rows[0][0]
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if min_stream_id is not None and max_stream_id is not None:
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progress = {
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"target_min_stream_id_inclusive": min_stream_id,
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"max_stream_id_exclusive": max_stream_id + 1,
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"rows_inserted": 0,
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}
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progress_json = ujson.dumps(progress)
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sql = (
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"INSERT into background_updates (update_name, progress_json)"
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" VALUES (?, ?)"
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)
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sql = database_engine.convert_param_style(sql)
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cur.execute(sql, ("event_search_order", progress_json))
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@ -29,12 +29,17 @@ logger = logging.getLogger(__name__)
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class SearchStore(BackgroundUpdateStore):
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EVENT_SEARCH_UPDATE_NAME = "event_search"
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EVENT_SEARCH_ORDER_UPDATE_NAME = "event_search_order"
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def __init__(self, hs):
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super(SearchStore, self).__init__(hs)
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self.register_background_update_handler(
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self.EVENT_SEARCH_UPDATE_NAME, self._background_reindex_search
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)
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self.register_background_update_handler(
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self.EVENT_SEARCH_ORDER_UPDATE_NAME,
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self._background_reindex_search_order
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)
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@defer.inlineCallbacks
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def _background_reindex_search(self, progress, batch_size):
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@ -131,6 +136,61 @@ class SearchStore(BackgroundUpdateStore):
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _background_reindex_search_order(self, progress, batch_size):
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target_min_stream_id = progress["target_min_stream_id_inclusive"]
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max_stream_id = progress["max_stream_id_exclusive"]
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rows_inserted = progress.get("rows_inserted", 0)
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INSERT_CLUMP_SIZE = 1000
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def reindex_search_txn(txn):
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sql = (
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"SELECT stream_ordering, origin_server_ts, event_id FROM events"
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" INNER JOIN event_search USING (room_id, event_id)"
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" WHERE ? <= stream_ordering AND stream_ordering < ?"
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" ORDER BY stream_ordering DESC"
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" LIMIT ?"
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)
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txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
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rows = txn.fetchall()
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if not rows:
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return 0
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min_stream_id = rows[-1][0]
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sql = (
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"UPDATE event_search SET stream_ordering = ?, origin_server_ts = ?"
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" WHERE event_id = ?"
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)
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for index in range(0, len(rows), INSERT_CLUMP_SIZE):
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clump = rows[index:index + INSERT_CLUMP_SIZE]
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txn.executemany(sql, clump)
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progress = {
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"target_min_stream_id_inclusive": target_min_stream_id,
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"max_stream_id_exclusive": min_stream_id,
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"rows_inserted": rows_inserted + len(rows)
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}
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self._background_update_progress_txn(
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txn, self.EVENT_SEARCH_ORDER_UPDATE_NAME, progress
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)
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return len(rows)
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result = yield self.runInteraction(
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self.EVENT_SEARCH_ORDER_UPDATE_NAME, reindex_search_txn
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)
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if not result:
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yield self._end_background_update(self.EVENT_SEARCH_ORDER_UPDATE_NAME)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def search_msgs(self, room_ids, search_term, keys):
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"""Performs a full text search over events with given keys.
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@ -310,7 +370,6 @@ class SearchStore(BackgroundUpdateStore):
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"SELECT ts_rank_cd(vector, to_tsquery('english', ?)) as rank,"
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" origin_server_ts, stream_ordering, room_id, event_id"
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" FROM event_search"
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" NATURAL JOIN events"
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" WHERE vector @@ to_tsquery('english', ?) AND "
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)
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args = [search_query, search_query] + args
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