25.39.27 The INFORMATION_SCHEMA INNODB_TABLESTATS View

TABLE_ID

An identifier representing the table for which statistics are available; the same value as INNODB_TABLES.TABLE_ID.

NAME

The name of the table; the same value as INNODB_TABLES.NAME.

STATS_INITIALIZED

The value is Initialized if the statistics are already collected, Uninitialized if not.

NUM_ROWS

The current estimated number of rows in the table. Updated after each DML operation. The value could be imprecise if uncommitted transactions are inserting into or deleting from the table.

CLUST_INDEX_SIZE

The number of pages on disk that store the clustered index, which holds the InnoDB table data in primary key order. This value might be null if no statistics are collected yet for the table.

OTHER_INDEX_SIZE

The number of pages on disk that store all secondary indexes for the table. This value might be null if no statistics are collected yet for the table.

MODIFIED_COUNTER

The number of rows modified by DML operations, such as INSERT, UPDATE, DELETE, and also cascade operations from foreign keys. This column is reset each time table statistics are recalculated

AUTOINC

The next number to be issued for any auto-increment-based operation. The rate at which the AUTOINC value changes depends on how many times auto-increment numbers have been requested and how many numbers are granted per request.

REF_COUNT

When this counter reaches zero, the table metadata can be evicted from the table cache.

This table is useful primarily for expert-level performance monitoring, or when developing performance-related extensions for MySQL.

You must have the PROCESS privilege to query this table.

Use the INFORMATION_SCHEMA COLUMNS table or the SHOW COLUMNS statement to view additional information about the columns of this table, including data types and default values.