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SET @n_pages= @@GLOBAL.innodb_defragment_n_pages;
SET @accuracy= @@GLOBAL.innodb_defragment_stats_accuracy;
SET @sp= @@GLOBAL.innodb_stats_persistent;
SET GLOBAL innodb_stats_persistent = 0;
set global innodb_defragment_stats_accuracy = 80;
CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
b VARCHAR(256),
c INT,
g GEOMETRY NOT NULL,
t VARCHAR(256),
KEY second(a, b),
KEY third(c),
SPATIAL gk(g),
FULLTEXT INDEX fti(t)) ENGINE=INNODB;
connect con1,localhost,root,,test,$MASTER_MYPORT,$MASTER_MYSOCK;
connect con2,localhost,root,,test,$MASTER_MYPORT,$MASTER_MYSOCK;
connect con3,localhost,root,,test,$MASTER_MYPORT,$MASTER_MYSOCK;
connect con4,localhost,root,,test,$MASTER_MYPORT,$MASTER_MYSOCK;
connection default;
SET @@global.innodb_defragment_n_pages = 20;
CREATE TEMPORARY TABLE tt (a INT, KEY(a)) ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
INSERT INTO tt SELECT 0 FROM seq_1_to_180;
INSERT INTO tt SELECT 5 FROM seq_1_to_160;
INSERT INTO tt SELECT 1 FROM seq_1_to_1000;
OPTIMIZE TABLE tt;
Table Op Msg_type Msg_text
test.tt optimize note Table does not support optimize, doing recreate + analyze instead
test.tt optimize status OK
select count(*) from t1;
count(*)
20000
select count(*) from t1 force index (second);
count(*)
20000
select count(*) from t1 force index (third);
count(*)
20000
select count(*) from t1;
count(*)
15800
select count(*) from t1 force index (second);
count(*)
15800
select count(*) from t1 force index (third);
count(*)
15800
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
count(stat_value) > 0
0
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
count(stat_value) > 0
1
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
count(stat_value) > 0
1
connection con1;
optimize table t1;;
connection default;
INSERT INTO t1 VALUES (400000, REPEAT('A', 256),300000, Point(1,1),'More like a test but different.');;
connection con2;
INSERT INTO t1 VALUES (500000, REPEAT('A', 256),400000, Point(1,1),'Totally different text book.');;
connection con3;
DELETE FROM t1 where a between 1 and 100;;
connection con4;
UPDATE t1 SET c = c + 1 where c between 2000 and 8000;;
connection con1;
connection con2;
connection con3;
connection con4;
connection default;
disconnect con1;
disconnect con2;
disconnect con3;
disconnect con4;
optimize table t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
check table t1 extended;
Table Op Msg_type Msg_text
test.t1 check status OK
select count(*) from t1;
count(*)
15723
select count(*) from t1 force index (second);
count(*)
15723
select count(*) from t1 force index (third);
count(*)
15723
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_pages_freed');
count(stat_value) > 0
1
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_page_split');
count(stat_value) > 0
1
select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and stat_name in ('n_leaf_pages_defrag');
count(stat_value) > 0
1
drop table t1;
SET GLOBAL innodb_defragment_n_pages = @n_pages;
SET GLOBAL innodb_defragment_stats_accuracy = @accuracy;
SET GLOBAL innodb_stats_persistent = @sp;
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