1.3.3 i/o maxed out on Debian stretch/sid

I ran filefrag on storage/orders.db*:
orders.db: 180 extents found
orders.db-shm: 3 extents found
orders.db-wal: 15 extents found

For context the sizes are:
582M May 3 23:12 orders.db
128K May 3 23:16 orders.db-shm
49M May 3 23:16 orders.db-wal

These don’t look so fragmented.