diff options
Diffstat (limited to 'synapse/storage/engines/postgres.py')
| -rw-r--r-- | synapse/storage/engines/postgres.py | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py index c2290943b4..a6ae79dfad 100644 --- a/synapse/storage/engines/postgres.py +++ b/synapse/storage/engines/postgres.py @@ -19,9 +19,10 @@ from ._base import IncorrectDatabaseSetup class PostgresEngine(object): single_threaded = False - def __init__(self, database_module): + def __init__(self, database_module, database_config): self.module = database_module self.module.extensions.register_type(self.module.extensions.UNICODE) + self.synchronous_commit = database_config.get("synchronous_commit", True) def check_database(self, txn): txn.execute("SHOW SERVER_ENCODING") @@ -40,9 +41,19 @@ class PostgresEngine(object): db_conn.set_isolation_level( self.module.extensions.ISOLATION_LEVEL_REPEATABLE_READ ) + # Asynchronous commit, don't wait for the server to call fsync before + # ending the transaction. + # https://www.postgresql.org/docs/current/static/wal-async-commit.html + if not self.synchronous_commit: + cursor = db_conn.cursor() + cursor.execute("SET synchronous_commit TO OFF") + cursor.close() def is_deadlock(self, error): if isinstance(error, self.module.DatabaseError): + # https://www.postgresql.org/docs/current/static/errcodes-appendix.html + # "40001" serialization_failure + # "40P01" deadlock_detected return error.pgcode in ["40001", "40P01"] return False |