make && time /tmp/src/pin-2.14-71313-gcc.4.4.7-linux/pin -t ~/follow_io/follow_io.so -- sqlite3 ./experiments/sqlite/records.sqlite3 "select * from records" | less
$ cat out.ldj | ./byte_usage.js
$ mv usage.json used_bytes.txt read_bytes.txt out.ldj experiments/sqlite/all