tests: disable fsync

Author: gsmolk

tests/helpers/ptrack_helpers.py

@@ -285,7 +285,7 @@ def make_simple_node(
         # Sane default parameters
         node.append_conf('postgresql.auto.conf', 'max_connections = 100')
         node.append_conf('postgresql.auto.conf', 'shared_buffers = 10MB')
-        node.append_conf('postgresql.auto.conf', 'fsync = on')
+        node.append_conf('postgresql.auto.conf', 'fsync = off')
         node.append_conf('postgresql.auto.conf', 'wal_level = logical')
         node.append_conf('postgresql.auto.conf', 'hot_standby = off')