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SET SESSION STORAGE_ENGINE = InnoDB;
drop table if exists t1,t2,t3;
set @save_query_cache_size = @@global.query_cache_size;
set GLOBAL query_cache_size = 1355776;
flush status;
set autocommit=0;
create table t1 (a int not null) PARTITION BY KEY (a) PARTITIONS 3;
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
drop table t1;
commit;
set autocommit=1;
begin;
create table t1 (a int not null) PARTITION BY KEY (a) PARTITIONS 3;
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
drop table t1;
commit;
create table t1 (a int not null) PARTITION BY KEY (a) PARTITIONS 3;
create table t2 (a int not null) PARTITION BY KEY (a) PARTITIONS 3;
create table t3 (a int not null) PARTITION BY KEY (a) PARTITIONS 3;
insert into t1 values (1),(2);
insert into t2 values (1),(2);
insert into t3 values (1),(2);
select * from t1;
a
1
2
select * from t2;
a
1
2
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
begin;
select * from t1;
a
1
2
select * from t2;
a
1
2
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
insert into t1 values (3);
insert into t2 values (3);
insert into t1 values (4);
select * from t1;
a
1
2
3
4
select * from t2;
a
1
2
3
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
commit;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 2
drop table t3,t2,t1;
CREATE TABLE t1 (id int(11) NOT NULL auto_increment, PRIMARY KEY (id)) PARTITION BY HASH (id) PARTITIONS 3;
select count(*) from t1;
count(*)
0
insert into t1 (id) values (0);
select count(*) from t1;
count(*)
1
drop table t1;
SET SESSION STORAGE_ENGINE = InnoDB;
SET @@autocommit=1;
connection default
SHOW VARIABLES LIKE 'have_query_cache';
Variable_name Value
have_query_cache YES
SET GLOBAL query_cache_size = 204800;
flush status;
SET @@autocommit=1;
SET SESSION STORAGE_ENGINE = InnoDB;
CREATE TABLE t2 (s1 int, s2 varchar(1000), key(s1)) PARTITION BY KEY (s1) PARTITIONS 3;
INSERT INTO t2 VALUES (1,repeat('a',10)),(2,repeat('a',10)),(3,repeat('a',10)),(4,repeat('a',10));
COMMIT;
START TRANSACTION;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
0
UPDATE t2 SET s2 = 'w' WHERE s1 = 3;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
1
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
connection connection1
START TRANSACTION;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
0
INSERT INTO t2 VALUES (5,'w');
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
1
COMMIT;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
1
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
connection default
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
1
COMMIT;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
connection connection1
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
START TRANSACTION;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
INSERT INTO t2 VALUES (6,'w');
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
3
connection default
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
START TRANSACTION;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
DELETE from t2 WHERE s1=3;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
1
COMMIT;
connection connection1
COMMIT;
SELECT sql_cache count(*) FROM t2 WHERE s2 = 'w';
count(*)
2
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
set @@global.query_cache_size = @save_query_cache_size;
drop table t2;
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