pg_test_fsync (1) Linux Manual Page
NAME pg_test_fsync – determine fastest wal_sync_method for PostgreSQL SYNOPSIS pg_test_fsync [option…] DESCRIPTION pg_test_fsync is intended to give you a reasonable idea of what the fastest wal_sync_method is on your specific system, as well as supplying diagnostic information in the event of an identified I/O problem. However, differences shown by pg_test_fsync might not make any difference…
