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Remove Postgres 9.4 support (#5448)

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Amber Brown 2019-06-18 00:59:00 +10:00 • committed by GitHub
parent 6840ebeef8
commit eba7caf09f
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10 changed files with 50 additions and 79 deletions
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8
synapse/storage/engines/postgres.py
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@ -45,6 +45,10 @@ class PostgresEngine(object):
# together. For example, version 8.1.5 will be returned as 80105
self._version = db_conn.server_version
# Are we on a supported PostgreSQL version?
if self._version < 90500:
raise RuntimeError("Synapse requires PostgreSQL 9.5+ or above.")
db_conn.set_isolation_level(
self.module.extensions.ISOLATION_LEVEL_REPEATABLE_READ
)
@ -64,9 +68,9 @@ class PostgresEngine(object):
@property
def can_native_upsert(self):
"""
Can we use native UPSERTs? This requires PostgreSQL 9.5+.
Can we use native UPSERTs?
"""
return self._version >= 90500
return True
def is_deadlock(self, error):
if isinstance(error, self.module.DatabaseError):

22
synapse/storage/search.py
View file

@ -341,29 +341,7 @@ class SearchStore(BackgroundUpdateStore):
for entry in entries
)
# inserts to a GIN index are normally batched up into a pending
# list, and then all committed together once the list gets to a
# certain size. The trouble with that is that postgres (pre-9.5)
# uses work_mem to determine the length of the list, and work_mem
# is typically very large.
#
# We therefore reduce work_mem while we do the insert.
#
# (postgres 9.5 uses the separate gin_pending_list_limit setting,
# so doesn't suffer the same problem, but changing work_mem will
# be harmless)
#
# Note that we don't need to worry about restoring it on
# exception, because exceptions will cause the transaction to be
# rolled back, including the effects of the SET command.
#
# Also: we use SET rather than SET LOCAL because there's lots of
# other stuff going on in this transaction, which want to have the
# normal work_mem setting.
txn.execute("SET work_mem='256kB'")
txn.executemany(sql, args)
txn.execute("RESET work_mem")
elif isinstance(self.database_engine, Sqlite3Engine):
sql = (