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Fix chain cover background update to work with split out event persisters (#9115)
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changelog.d/9115.misc
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1
changelog.d/9115.misc
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@ -0,0 +1 @@
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Improve efficiency of large state resolutions.
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@ -49,6 +49,7 @@ from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.storage.background_updates import BackgroundUpdater
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from synapse.storage.engines import BaseDatabaseEngine, PostgresEngine, Sqlite3Engine
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from synapse.storage.types import Connection, Cursor
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from synapse.storage.util.sequence import build_sequence_generator
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from synapse.types import Collection
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# python 3 does not have a maximum int value
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@ -412,6 +413,16 @@ class DatabasePool:
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self._check_safe_to_upsert,
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)
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# We define this sequence here so that it can be referenced from both
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# the DataStore and PersistEventStore.
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def get_chain_id_txn(txn):
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txn.execute("SELECT COALESCE(max(chain_id), 0) FROM event_auth_chains")
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return txn.fetchone()[0]
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self.event_chain_id_gen = build_sequence_generator(
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engine, get_chain_id_txn, "event_auth_chain_id"
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)
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def is_running(self) -> bool:
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"""Is the database pool currently running
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"""
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@ -43,7 +43,6 @@ from synapse.storage._base import db_to_json, make_in_list_sql_clause
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from synapse.storage.database import DatabasePool, LoggingTransaction
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from synapse.storage.databases.main.search import SearchEntry
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from synapse.storage.util.id_generators import MultiWriterIdGenerator
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from synapse.storage.util.sequence import build_sequence_generator
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from synapse.types import StateMap, get_domain_from_id
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from synapse.util import json_encoder
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from synapse.util.iterutils import batch_iter, sorted_topologically
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@ -100,14 +99,6 @@ class PersistEventsStore:
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self._clock = hs.get_clock()
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self._instance_name = hs.get_instance_name()
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def get_chain_id_txn(txn):
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txn.execute("SELECT COALESCE(max(chain_id), 0) FROM event_auth_chains")
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return txn.fetchone()[0]
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self._event_chain_id_gen = build_sequence_generator(
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db.engine, get_chain_id_txn, "event_auth_chain_id"
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)
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self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages
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self.is_mine_id = hs.is_mine_id
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@ -479,12 +470,13 @@ class PersistEventsStore:
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event_to_room_id = {e.event_id: e.room_id for e in state_events.values()}
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self._add_chain_cover_index(
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txn, event_to_room_id, event_to_types, event_to_auth_chain
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txn, self.db_pool, event_to_room_id, event_to_types, event_to_auth_chain,
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)
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@staticmethod
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def _add_chain_cover_index(
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self,
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txn,
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db_pool: DatabasePool,
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event_to_room_id: Dict[str, str],
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event_to_types: Dict[str, Tuple[str, str]],
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event_to_auth_chain: Dict[str, List[str]],
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@ -507,7 +499,7 @@ class PersistEventsStore:
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# We check if there are any events that need to be handled in the rooms
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# we're looking at. These should just be out of band memberships, where
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# we didn't have the auth chain when we first persisted.
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rows = self.db_pool.simple_select_many_txn(
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rows = db_pool.simple_select_many_txn(
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txn,
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table="event_auth_chain_to_calculate",
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keyvalues={},
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@ -523,7 +515,7 @@ class PersistEventsStore:
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# (We could pull out the auth events for all rows at once using
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# simple_select_many, but this case happens rarely and almost always
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# with a single row.)
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auth_events = self.db_pool.simple_select_onecol_txn(
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auth_events = db_pool.simple_select_onecol_txn(
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txn, "event_auth", keyvalues={"event_id": event_id}, retcol="auth_id",
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)
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@ -572,9 +564,7 @@ class PersistEventsStore:
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events_to_calc_chain_id_for.add(auth_id)
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event_to_auth_chain[
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auth_id
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] = self.db_pool.simple_select_onecol_txn(
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event_to_auth_chain[auth_id] = db_pool.simple_select_onecol_txn(
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txn,
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"event_auth",
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keyvalues={"event_id": auth_id},
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@ -606,7 +596,7 @@ class PersistEventsStore:
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room_id = event_to_room_id.get(event_id)
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if room_id:
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e_type, state_key = event_to_types[event_id]
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self.db_pool.simple_insert_txn(
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db_pool.simple_insert_txn(
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txn,
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table="event_auth_chain_to_calculate",
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values={
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@ -651,7 +641,7 @@ class PersistEventsStore:
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proposed_new_id = existing_chain_id[0]
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proposed_new_seq = existing_chain_id[1] + 1
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if (proposed_new_id, proposed_new_seq) not in chains_tuples_allocated:
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already_allocated = self.db_pool.simple_select_one_onecol_txn(
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already_allocated = db_pool.simple_select_one_onecol_txn(
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txn,
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table="event_auth_chains",
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keyvalues={
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@ -672,14 +662,14 @@ class PersistEventsStore:
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)
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if not new_chain_tuple:
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new_chain_tuple = (self._event_chain_id_gen.get_next_id_txn(txn), 1)
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new_chain_tuple = (db_pool.event_chain_id_gen.get_next_id_txn(txn), 1)
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chains_tuples_allocated.add(new_chain_tuple)
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chain_map[event_id] = new_chain_tuple
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new_chain_tuples[event_id] = new_chain_tuple
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self.db_pool.simple_insert_many_txn(
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db_pool.simple_insert_many_txn(
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txn,
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table="event_auth_chains",
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values=[
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@ -688,7 +678,7 @@ class PersistEventsStore:
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],
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)
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self.db_pool.simple_delete_many_txn(
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db_pool.simple_delete_many_txn(
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txn,
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table="event_auth_chain_to_calculate",
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keyvalues={},
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@ -721,7 +711,7 @@ class PersistEventsStore:
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# Step 1, fetch all existing links from all the chains we've seen
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# referenced.
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chain_links = _LinkMap()
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rows = self.db_pool.simple_select_many_txn(
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rows = db_pool.simple_select_many_txn(
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txn,
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table="event_auth_chain_links",
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column="origin_chain_id",
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@ -785,7 +775,7 @@ class PersistEventsStore:
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(chain_id, sequence_number), (target_id, target_seq)
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)
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self.db_pool.simple_insert_many_txn(
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db_pool.simple_insert_many_txn(
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txn,
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table="event_auth_chain_links",
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values=[
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@ -21,6 +21,7 @@ from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
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from synapse.events import make_event_from_dict
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from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
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from synapse.storage.database import DatabasePool, make_tuple_comparison_clause
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from synapse.storage.databases.main.events import PersistEventsStore
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from synapse.storage.types import Cursor
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from synapse.types import JsonDict
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@ -833,8 +834,12 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
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#
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# Annoyingly we need to gut wrench into the persit event store so that
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# we can reuse the function to calculate the chain cover for rooms.
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self.hs.get_datastores().persist_events._add_chain_cover_index(
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txn, event_to_room_id, event_to_types, event_to_auth_chain,
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PersistEventsStore._add_chain_cover_index(
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txn,
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self.db_pool,
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event_to_room_id,
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event_to_types,
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event_to_auth_chain,
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)
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return new_last_depth, new_last_stream, count
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@ -15,9 +15,8 @@
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import abc
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import logging
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import threading
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from typing import Callable, List, Optional
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from typing import TYPE_CHECKING, Callable, List, Optional
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from synapse.storage.database import LoggingDatabaseConnection
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from synapse.storage.engines import (
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BaseDatabaseEngine,
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IncorrectDatabaseSetup,
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@ -25,6 +24,9 @@ from synapse.storage.engines import (
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)
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from synapse.storage.types import Connection, Cursor
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if TYPE_CHECKING:
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from synapse.storage.database import LoggingDatabaseConnection
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logger = logging.getLogger(__name__)
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@ -55,7 +57,7 @@ class SequenceGenerator(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def check_consistency(
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self,
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db_conn: LoggingDatabaseConnection,
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db_conn: "LoggingDatabaseConnection",
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table: str,
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id_column: str,
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positive: bool = True,
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@ -88,7 +90,7 @@ class PostgresSequenceGenerator(SequenceGenerator):
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def check_consistency(
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self,
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db_conn: LoggingDatabaseConnection,
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db_conn: "LoggingDatabaseConnection",
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table: str,
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id_column: str,
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positive: bool = True,
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