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SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
SET GLOBAL innodb_fast_shutdown=0;
SET GLOBAL innodb_cmp_per_index_enabled=ON;
SELECT * FROM information_schema.innodb_cmp_per_index;
CREATE TABLE t (
a INT,
b VARCHAR(512),
c VARCHAR(16),
PRIMARY KEY (a),
INDEX (b(512)),
INDEX (c(16))
) ENGINE=INNODB KEY_BLOCK_SIZE=2;
SELECT
database_name,
table_name,
index_name,
compress_ops,
compress_ops_ok,
uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;
database_name test
table_name t
index_name b
compress_ops 1
compress_ops_ok 1
uncompress_ops 0
database_name test
table_name t
index_name c
compress_ops 1
compress_ops_ok 1
uncompress_ops 0
database_name test
table_name t
index_name PRIMARY
compress_ops 1
compress_ops_ok 1
uncompress_ops 0
BEGIN;
COMMIT;
ALTER TABLE t DROP INDEX c;
GRANT USAGE ON *.* TO 'tuser01'@'localhost' IDENTIFIED BY 'cDJvI9s_Uq';
FLUSH PRIVILEGES;
connect con1,localhost,tuser01,cDJvI9s_Uq,;
connection con1;
SELECT * FROM information_schema.innodb_cmp_per_index;
ERROR 42000: Access denied; you need (at least one of) the PROCESS privilege(s) for this operation
connection default;
disconnect con1;
DROP USER 'tuser01'@'localhost';
SELECT
database_name,
table_name,
index_name,
CASE WHEN compress_ops=47 and @@innodb_compression_level IN (4,8,9) THEN 65
ELSE compress_ops END as compress_ops,
CASE WHEN compress_ops_ok=47 and @@innodb_compression_level IN (4,8,9) THEN 65
ELSE compress_ops_ok END as compress_ops_ok,
uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;
database_name test
table_name t
index_name b
compress_ops 43
compress_ops_ok 43
uncompress_ops 0
database_name test
table_name t
index_name PRIMARY
compress_ops 65
compress_ops_ok 65
uncompress_ops 0
# restart
SHOW CREATE TABLE t;
Table t
Create Table CREATE TABLE `t` (
`a` int(11) NOT NULL,
`b` varchar(512) DEFAULT NULL,
`c` varchar(16) DEFAULT NULL,
PRIMARY KEY (`a`),
KEY `b` (`b`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 KEY_BLOCK_SIZE=2
SET GLOBAL innodb_cmp_per_index_enabled=ON;
SELECT COUNT(*) FROM t IGNORE INDEX(b);
COUNT(*) 128
SELECT
database_name,
table_name,
index_name,
compress_ops,
compress_ops_ok,
CASE WHEN uncompress_ops=6 and @@innodb_compression_level IN (4,8,9) THEN 9
ELSE uncompress_ops END as uncompress_ops
FROM information_schema.innodb_cmp_per_index
ORDER BY 1, 2, 3;
database_name test
table_name t
index_name PRIMARY
compress_ops 0
compress_ops_ok 0
uncompress_ops 4
DROP TABLE t;
SET GLOBAL innodb_cmp_per_index_enabled=default;
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