PG_TEST_FSYNC(1) PostgreSQL 18.6 Documentation PG_TEST_FSYNC(1) (NAME) pg_test_fsync - wal_sync_method PostgreSQL (SYNOPSIS) pg_test_fsync [...] (DESCRIPTION) pg_test_fsync wal_sync_method I/O . pg_test_fsync (write-ahead logs) . pg_test_fsync wal_sync_method commit_delay . (OPTIONS) pg_test_fsync : -f --filename . pg_wal . ( pg_wal WAL .) pg_test_fsync.out . -s --secs-per-test . . . -V --version pg_test_fsync . -? --help pg_test_fsync . (ENVIRONMENT) PG_COLOR . always auto never. (SEE ALSO) postgres(1) PostgreSQL 18.6 2026 PG_TEST_FSYNC(1)