# Information Schema INNODB\_SYS\_TABLESTATS Table

The [Information Schema](/docs/server/reference/system-tables/information-schema.md) `INNODB_SYS_TABLESTATS` table contains InnoDB status information. It can be used for developing new performance-related extensions, or high-level performance monitoring.

The `PROCESS` [privilege](/docs/server/reference/sql-statements/account-management-sql-statements/grant.md) is required to view the table.

Note that the MySQL InnoDB and Percona XtraDB versions of the tables differ (see [XtraDB and InnoDB](/docs/server/server-usage/storage-engines/innodb.md)).

It contains the following columns:

| Column                 | Description                                                                                                                                                                                                                     |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| TABLE\_ID              | Table ID, matching the [INNODB\_SYS\_TABLES.TABLE\_ID](/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-innodb-tables/information-schema-innodb_sys_tables-table.md) value. |
| SCHEMA                 | Database name (XtraDB only).                                                                                                                                                                                                    |
| NAME                   | Table name, matching the [INNODB\_SYS\_TABLES.NAME](/docs/server/reference/system-tables/information-schema/information-schema-tables/information-schema-innodb-tables/information-schema-innodb_sys_tables-table.md) value.    |
| STATS\_INITIALIZED     | Initialized if statistics have already been collected, otherwise Uninitialized.                                                                                                                                                 |
| NUM\_ROWS              | Estimated number of rows currently in the table. Updated after each statement modifying the data, but uncommited transactions mean it may not be accurate.                                                                      |
| CLUST\_INDEX\_SIZE     | Number of pages on disk storing the clustered index, holding InnoDB table data in primary key order, or NULL if not statistics yet collected.                                                                                   |
| OTHER\_INDEX\_SIZE     | Number of pages on disk storing secondary indexes for the table, or NULL if not statistics yet collected.                                                                                                                       |
| MODIFIED\_COUNTER      | Number of rows modified by statements modifying data.                                                                                                                                                                           |
| AUTOINC                | [Auto\_increment](/docs/server/reference/data-types/auto_increment.md) value.                                                                                                                                                   |
| REF\_COUNT             | Countdown to zero, when table metadata can be removed from the table cache. (InnoDB only)                                                                                                                                       |
| MYSQL\_HANDLES\_OPENED | (XtraDB only).                                                                                                                                                                                                                  |

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