set GLOBAL query_cache_size=1355776;
flush query cache;
flush query cache;
reset query cache;
flush status;
drop table if exists t1, t2, t3, t11, t21;
create table t1 (a int not null);
insert into t1 values (1),(2),(3);
create table t2 (a int not null);
insert into t2 values (1),(2),(3);
select * from t1;
a
1
2
3
select * from t2;
a
1
2
3
insert into t1 values (4);
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	2
flush query cache;
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
drop table t1, t2;
create table t1 (a text not null);
create table t11 (a text not null);
create table t2 (a text not null);
create table t21 (a text not null);
create table t3 (a text not null);
insert into t1 values("1111111111111111111111111111111111111111111111111111");
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t11 select * from t1;
insert into t21 select * from t1;
insert into t1 select * from t2;
insert into t2 select * from t1;
insert into t1 select * from t2;
insert into t3 select * from t1;
insert into t3 select * from t2;
insert into t3 select * from t1;
select * from t11;
select * from t21;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	7
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
insert into t11 values("");
select * from t3;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	8
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
flush query cache;
show status like "Qcache_total_blocks";
Variable_name	Value
Qcache_total_blocks	7
show status like "Qcache_free_blocks";
Variable_name	Value
Qcache_free_blocks	1
drop table t1, t2, t3, t11, t21;
CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY AUTO_INCREMENT ) ENGINE =
MyISAM;
LOCK TABLE t1 READ LOCAL;
INSERT INTO t1 VALUES (), (), ();
SELECT * FROM t1;
a
SELECT * FROM t1;
a
1
2
3
SELECT * FROM t1;
a
drop table t1;
set GLOBAL query_cache_size=0;
