first be sure you have sqlite >=3.7: 1) open python 2)>import sqlite3 3)>print sqlite3.sqlite_version
if you don't have sqlite >=3.7 you can't use wal
put the code in models/db.py after database connection
db = DAL('sqlite://storage.sqlite')
db.executesql('PRAGMA journal_mode=WAL')
but you can remove it after one run
read more here http://www.sqlite.org/draft/wal.html
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