include/master-slave.inc [connection master] create table t1 (a int not null auto_increment primary key, b int, key(b)); INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10); INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; INSERT INTO t1 (a) SELECT null FROM t1; update t1 set b=(a/2*rand()); delete from t1 order by b limit 10000; optimize table t1; Table Op Msg_type Msg_text test.t1 optimize status OK drop table t1; include/rpl_end.inc