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SET GLOBAL innodb_undo_log_truncate = 0;
SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
=== information_schema.innodb_sys_tablespaces and innodb_sys_datafiles ===
Space_Name Page_Size Zip_Size Path
innodb_undo001 DEFAULT DEFAULT MYSQLD_DATADIR//undo001
innodb_undo002 DEFAULT DEFAULT MYSQLD_DATADIR//undo002
innodb_temporary DEFAULT DEFAULT MYSQLD_DATADIR/ibtmp1
create table t1(keyc int primary key, c char(100)) engine = innodb;
create table t2(keyc int primary key, c char(100)) engine = innodb;
connect con1,localhost,root,,;
begin;
insert into t1 select seq,'a' from seq_1_to_20000;
connect con2,localhost,root,,;
begin;
insert into t2 select seq,'a' from seq_1_to_20000;
connection con1;
update t1 set c = 'mysql';
connection con2;
update t2 set c = 'mysql';
connection con1;
update t1 set c = 'oracle';
connection con2;
update t2 set c = 'oracle';
connection con1;
delete from t1;
connection con2;
delete from t2;
connection con1;
SET GLOBAL innodb_undo_log_truncate = 1;
commit;
disconnect con1;
connection con2;
commit;
disconnect con2;
connection default;
SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
SET GLOBAL innodb_max_purge_lag_wait=0;
set global innodb_fast_shutdown=0;
# restart
drop table t1, t2;
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