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Use execute_batch instead of executemany in places (#9181)

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`execute_batch` does fewer round trips in postgres than `executemany`, but does not give a correct `txn.rowcount` result after.
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Erik Johnston 2021-01-21 10:22:53 +00:00 committed by GitHub
parent 1fa15b74e0
commit eee6fcf5fa
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3 changed files with 12 additions and 12 deletions
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1
changelog.d/9181.misc Normal file
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@ -0,0 +1 @@
Speed up batch insertion when using PostgreSQL.

5
synapse/storage/database.py
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@ -267,8 +267,7 @@ class LoggingTransaction:
self._do_execute(lambda *x: execute_batch(self.txn, *x), sql, args)
else:
for val in args:
self.execute(sql, val)
self.executemany(sql, args)
def execute_values(self, sql: str, *args: Any) -> List[Tuple]:
"""Corresponds to psycopg2.extras.execute_values. Only available when
@ -888,7 +887,7 @@ class DatabasePool:
", ".join("?" for _ in keys[0]),
)
txn.executemany(sql, vals)
txn.execute_batch(sql, vals)
async def simple_upsert(
self,

18
synapse/storage/databases/main/events.py
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@ -876,7 +876,7 @@ class PersistEventsStore:
WHERE room_id = ? AND type = ? AND state_key = ?
)
"""
txn.executemany(
txn.execute_batch(
sql,
(
(
@ -895,7 +895,7 @@ class PersistEventsStore:
)
# Now we actually update the current_state_events table
txn.executemany(
txn.execute_batch(
"DELETE FROM current_state_events"
" WHERE room_id = ? AND type = ? AND state_key = ?",
(
@ -907,7 +907,7 @@ class PersistEventsStore:
# We include the membership in the current state table, hence we do
# a lookup when we insert. This assumes that all events have already
# been inserted into room_memberships.
txn.executemany(
txn.execute_batch(
"""INSERT INTO current_state_events
(room_id, type, state_key, event_id, membership)
VALUES (?, ?, ?, ?, (SELECT membership FROM room_memberships WHERE event_id = ?))
@ -927,7 +927,7 @@ class PersistEventsStore:
# we have no record of the fact the user *was* a member of the
# room but got, say, state reset out of it.
if to_delete or to_insert:
txn.executemany(
txn.execute_batch(
"DELETE FROM local_current_membership"
" WHERE room_id = ? AND user_id = ?",
(
@ -938,7 +938,7 @@ class PersistEventsStore:
)
if to_insert:
txn.executemany(
txn.execute_batch(
"""INSERT INTO local_current_membership
(room_id, user_id, event_id, membership)
VALUES (?, ?, ?, (SELECT membership FROM room_memberships WHERE event_id = ?))
@ -1738,7 +1738,7 @@ class PersistEventsStore:
"""
if events_and_contexts:
txn.executemany(
txn.execute_batch(
sql,
(
(
@ -1767,7 +1767,7 @@ class PersistEventsStore:
# Now we delete the staging area for *all* events that were being
# persisted.
txn.executemany(
txn.execute_batch(
"DELETE FROM event_push_actions_staging WHERE event_id = ?",
((event.event_id,) for event, _ in all_events_and_contexts),
)
@ -1886,7 +1886,7 @@ class PersistEventsStore:
" )"
)
txn.executemany(
txn.execute_batch(
query,
[
(e_id, ev.room_id, e_id, ev.room_id, e_id, ev.room_id, False)
@ -1900,7 +1900,7 @@ class PersistEventsStore:
"DELETE FROM event_backward_extremities"
" WHERE event_id = ? AND room_id = ?"
)
txn.executemany(
txn.execute_batch(
query,
[
(ev.event_id, ev.room_id)