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Rebuild other indexes using `stream_ordering` (#10282) 

We need to rebuild *all* of the indexes that use the current `stream_ordering`
column.
This commit is contained in:
Richard van der Hoff 2021-06-30 15:01:24 +01:00 committed by GitHub
parent e6f5b9359f
commit 859dc05b36
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3 changed files with 56 additions and 6 deletions
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1
changelog.d/10282.bugfix Normal file
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@ -0,0 +1 @@
Fix a long-standing bug where Synapse would return errors after 2<sup>31</sup> events were handled by the server.

50
synapse/storage/databases/main/events_bg_updates.py
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@ -29,13 +29,18 @@ from synapse.types import JsonDict
logger = logging.getLogger(__name__)
_REPLACE_STREAM_ORDRING_SQL_COMMANDS = (
_REPLACE_STREAM_ORDERING_SQL_COMMANDS = (
# there should be no leftover rows without a stream_ordering2, but just in case...
"UPDATE events SET stream_ordering2 = stream_ordering WHERE stream_ordering2 IS NULL",
# finally, we can drop the rule and switch the columns
# now we can drop the rule and switch the columns
"DROP RULE populate_stream_ordering2 ON events",
"ALTER TABLE events DROP COLUMN stream_ordering",
"ALTER TABLE events RENAME COLUMN stream_ordering2 TO stream_ordering",
# ... and finally, rename the indexes into place for consistency with sqlite
"ALTER INDEX event_contains_url_index2 RENAME TO event_contains_url_index",
"ALTER INDEX events_order_room2 RENAME TO events_order_room",
"ALTER INDEX events_room_stream2 RENAME TO events_room_stream",
"ALTER INDEX events_ts2 RENAME TO events_ts",
)
@ -45,6 +50,10 @@ class _BackgroundUpdates:
DELETE_SOFT_FAILED_EXTREMITIES = "delete_soft_failed_extremities"
POPULATE_STREAM_ORDERING2 = "populate_stream_ordering2"
INDEX_STREAM_ORDERING2 = "index_stream_ordering2"
INDEX_STREAM_ORDERING2_CONTAINS_URL = "index_stream_ordering2_contains_url"
INDEX_STREAM_ORDERING2_ROOM_ORDER = "index_stream_ordering2_room_order"
INDEX_STREAM_ORDERING2_ROOM_STREAM = "index_stream_ordering2_room_stream"
INDEX_STREAM_ORDERING2_TS = "index_stream_ordering2_ts"
REPLACE_STREAM_ORDERING_COLUMN = "replace_stream_ordering_column"
@ -155,12 +164,16 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
self._purged_chain_cover_index,
)
################################################################################
# bg updates for replacing stream_ordering with a BIGINT
# (these only run on postgres.)
self.db_pool.updates.register_background_update_handler(
_BackgroundUpdates.POPULATE_STREAM_ORDERING2,
self._background_populate_stream_ordering2,
)
# CREATE UNIQUE INDEX events_stream_ordering ON events(stream_ordering2);
self.db_pool.updates.register_background_index_update(
_BackgroundUpdates.INDEX_STREAM_ORDERING2,
index_name="events_stream_ordering",
@ -168,11 +181,42 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
columns=["stream_ordering2"],
unique=True,
)
# CREATE INDEX event_contains_url_index ON events(room_id, topological_ordering, stream_ordering) WHERE contains_url = true AND outlier = false;
self.db_pool.updates.register_background_index_update(
_BackgroundUpdates.INDEX_STREAM_ORDERING2_CONTAINS_URL,
index_name="event_contains_url_index2",
table="events",
columns=["room_id", "topological_ordering", "stream_ordering2"],
where_clause="contains_url = true AND outlier = false",
)
# CREATE INDEX events_order_room ON events(room_id, topological_ordering, stream_ordering);
self.db_pool.updates.register_background_index_update(
_BackgroundUpdates.INDEX_STREAM_ORDERING2_ROOM_ORDER,
index_name="events_order_room2",
table="events",
columns=["room_id", "topological_ordering", "stream_ordering2"],
)
# CREATE INDEX events_room_stream ON events(room_id, stream_ordering);
self.db_pool.updates.register_background_index_update(
_BackgroundUpdates.INDEX_STREAM_ORDERING2_ROOM_STREAM,
index_name="events_room_stream2",
table="events",
columns=["room_id", "stream_ordering2"],
)
# CREATE INDEX events_ts ON events(origin_server_ts, stream_ordering);
self.db_pool.updates.register_background_index_update(
_BackgroundUpdates.INDEX_STREAM_ORDERING2_TS,
index_name="events_ts2",
table="events",
columns=["origin_server_ts", "stream_ordering2"],
)
self.db_pool.updates.register_background_update_handler(
_BackgroundUpdates.REPLACE_STREAM_ORDERING_COLUMN,
self._background_replace_stream_ordering_column,
)
################################################################################
async def _background_reindex_fields_sender(self, progress, batch_size):
target_min_stream_id = progress["target_min_stream_id_inclusive"]
max_stream_id = progress["max_stream_id_exclusive"]
@ -1098,7 +1142,7 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
"""Drop the old 'stream_ordering' column and rename 'stream_ordering2' into its place."""
def process(txn: Cursor) -> None:
for sql in _REPLACE_STREAM_ORDRING_SQL_COMMANDS:
for sql in _REPLACE_STREAM_ORDERING_SQL_COMMANDS:
logger.info("completing stream_ordering migration: %s", sql)
txn.execute(sql)

11
synapse/storage/schema/main/delta/60/01recreate_stream_ordering.sql.postgres
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@ -31,10 +31,15 @@ CREATE OR REPLACE RULE "populate_stream_ordering2" AS
INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
(6001, 'populate_stream_ordering2', '{}');
-- ... and another to build an index on it
-- ... and some more to build indexes on it. These aren't really interdependent
-- but the backround_updates manager can only handle a single dependency per update.
INSERT INTO background_updates (ordering, update_name, progress_json, depends_on) VALUES
(6001, 'index_stream_ordering2', '{}', 'populate_stream_ordering2');
(6001, 'index_stream_ordering2', '{}', 'populate_stream_ordering2'),
(6001, 'index_stream_ordering2_room_order', '{}', 'index_stream_ordering2'),
(6001, 'index_stream_ordering2_contains_url', '{}', 'index_stream_ordering2_room_order'),
(6001, 'index_stream_ordering2_room_stream', '{}', 'index_stream_ordering2_contains_url'),
(6001, 'index_stream_ordering2_ts', '{}', 'index_stream_ordering2_room_stream');
-- ... and another to do the switcheroo
INSERT INTO background_updates (ordering, update_name, progress_json, depends_on) VALUES
(6001, 'replace_stream_ordering_column', '{}', 'index_stream_ordering2');
(6003, 'replace_stream_ordering_column', '{}', 'index_stream_ordering2_ts');