mysql.innodb_table_stats

The mysql.innodb_table_stats table stores data related to InnoDB Persistent Statistics, and contains one row per table.

This table, along with the related mysql.innodb_index_stats table, can be manually updated in order to force or test differing query optimization plans. After updating, FLUSH TABLE innodb_table_stats is required to load the changes.

mysql.innodb_table_stats is not replicated, although any ANALYZE TABLE statements on the table will be by default..

It contains the following fields:

Field	Type	Null	Key	Default	Description
`database_name`	`varchar(64)`	NO	PRI	`NULL`	Database name.
`table_name`	`varchar(64)`	NO	PRI	`NULL`	Table, partition or subpartition name.
`last_update`	`timestamp`	NO		`current_timestamp()`	Time that this row was last updated.
`n_rows`	`bigint(20) unsigned`	NO		`NULL`	Number of rows in the table.
`clustered_index_size`	`bigint(20) unsigned`	NO		`NULL`	Size, in pages, of the primary index.
`sum_of_other_index_sizes`	`bigint(20) unsigned`	NO		`NULL`	Size, in pages, of non-primary indexes.

Example

SELECT * FROM mysql.innodb_table_stats\G
*************************** 1. row ***************************
           database_name: mysql
              table_name: gtid_slave_pos
             last_update: 2017-08-19 20:38:34
                  n_rows: 0
    clustered_index_size: 1
sum_of_other_index_sizes: 0
*************************** 2. row ***************************
           database_name: test
              table_name: ft
             last_update: 2017-09-15 12:58:39
                  n_rows: 0
    clustered_index_size: 1
sum_of_other_index_sizes: 2
...

mysql.innodb_table_stats

Example

See Also