WAL 1369821752 bytes (as left by the 300 s sustained run):
ref_traversal ms: 11760 11361 11365 11359
checkpoint(TRUNCATE): (0, 0, 0)
stat: cannot statx '/home/ec2-user/data/wc/wal-m.db-wal': No such file or directory
WAL  bytes:
ref_traversal ms: 500 496 498 492