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.


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

See Also

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