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SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
CREATE TABLE t1(id INT PRIMARY key, val VARCHAR(16000)) ENGINE=InnoDB;
INSERT INTO t1 (id,val) SELECT 2*seq,'x' FROM seq_0_to_1023;
connect con1,localhost,root,,;
InnoDB 0 transactions not purged
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
DELETE FROM t1 WHERE id=1788;
BEGIN;
SELECT * FROM t1 WHERE id=1788 FOR UPDATE;
id val
connection con1;
COMMIT;
InnoDB 0 transactions not purged
connection default;
INSERT INTO t1 (id,val) VALUES (1787, REPEAT('x',2000));
connection con1;
SET innodb_lock_wait_timeout=0;
INSERT INTO t1 (id,val) VALUES (1788, 'x');
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SELECT * FROM t1 WHERE id=1788 FOR UPDATE;
id val
disconnect con1;
connection default;
COMMIT;
DROP TABLE t1;
SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
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