CREATE TABLE t1(b);
PRAGMA journal_mode = wal;
INSERT INTO t1 VALUES('hello');
INSERT INTO t1 VALUES('world');
INSERT INTO t1 VALUES('!');
INSERT INTO t1 VALUES('world');
INSERT INTO t1 VALUES('hello');
PRAGMA cache_size = 10;
BEGIN;
WITH s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<30 )
INSERT INTO t1(b) SELECT randomblob(800) FROM s;