1create table t (a int primary key, b int) engine=tokudb; 2insert into t values (1,0); 3set session transaction isolation level read committed; 4begin; 5select * from t where a=1 for update; 6a b 71 0 8update t set b=b+1 where a=1; 9connect conn1,localhost,root; 10set session tokudb_lock_timeout=60000; 11set session transaction isolation level read committed; 12begin; 13select * from t where a=1 for update; 14connection default; 15commit; 16connection conn1; 17a b 181 1 19update t set b=b+1 where a=1; 20select * from t; 21a b 221 2 23commit; 24connection default; 25disconnect conn1; 26drop table t; 27