Information Schema INNODB_SYS_TABLESPACES Table

The INNODB_SYS_TABLESPACES table provides metadata about the tablespaces used by InnoDB, including space ID, page size, and filename.

The Information Schema INNODB_SYS_TABLESPACES table contains information about InnoDB tablespaces. Until MariaDB 10.5 it was based on the internal SYS_TABLESPACES table. This internal table was removed in MariaDB 10.6.0, so this Information Schema table has been repurposed to directly reflect the filesystem (fil_system.space_list).

The PROCESS privilege is required to view the table.

It has the following columns:

Column	Description
SPACE	Unique InnoDB tablespace identifier.
NAME	Database and table name separated by a backslash, or the uppercase InnoDB system table name.
FLAG	1 if a DATA DIRECTORY option has been specified in CREATE TABLE, otherwise 0.
FILE_FORMAT	InnoDB file format.
ROW_FORMAT	InnoDB storage format used for this tablespace. If the Antelope file format is used, this value is always Compact or Redundant. When a table's checksum algorithm is full_crc32 (the default from MariaDB 10.5), the value can only be Compressed or NULL.
PAGE_SIZE	Page size in bytes for this tablespace. Until MariaDB 10.5.0, this was the value of the innodb_page_size variable. From MariaDB 10.6.0, contains the physical page size of a page (previously ZIP_PAGE_SIZE).
ZIP_PAGE_SIZE	Zip page size for this tablespace. Removed in MariaDB 10.6.0.
SPACE_TYPE	Tablespace type. Can be General for general tablespaces or Single for file-per-table tablespaces. Removed MariaDB 10.5.0.
FS_BLOCK_SIZE	File system block size.
FILE_SIZE	Maximum size of the file, uncompressed.
ALLOCATED_SIZE	Actual size of the file as per space allocated on disk.
FILENAME	Tablespace datafile path, previously part of the INNODB_SYS_DATAFILES table. Added in MariaDB 10.6.0.

Examples

DESC information_schema.innodb_sys_tablespaces;
+----------------+---------------------+------+-----+---------+-------+
| Field          | Type                | Null | Key | Default | Extra |
+----------------+---------------------+------+-----+---------+-------+
| SPACE          | int(11) unsigned    | NO   |     | 0       |       |
| NAME           | varchar(655)        | NO   |     |         |       |
| FLAG           | int(11) unsigned    | NO   |     | 0       |       |
| ROW_FORMAT     | varchar(22)         | YES  |     | NULL    |       |
| PAGE_SIZE      | int(11) unsigned    | NO   |     | 0       |       |
| ZIP_PAGE_SIZE  | int(11) unsigned    | NO   |     | 0       |       |
| SPACE_TYPE     | varchar(10)         | YES  |     | NULL    |       |
| FS_BLOCK_SIZE  | int(11) unsigned    | NO   |     | 0       |       |
| FILE_SIZE      | bigint(21) unsigned | NO   |     | 0       |       |
| ALLOCATED_SIZE | bigint(21) unsigned | NO   |     | 0       |       |
+----------------+---------------------+------+-----+---------+-------+

SELECT * FROM information_schema.INNODB_SYS_TABLESPACES LIMIT 2\G
*************************** 1. row ***************************
         SPACE: 2
          NAME: mysql/innodb_table_stats
          FLAG: 33
    ROW_FORMAT: Dynamic
     PAGE_SIZE: 16384
 ZIP_PAGE_SIZE: 0
    SPACE_TYPE: Single
 FS_BLOCK_SIZE: 4096
     FILE_SIZE: 98304
ALLOCATED_SIZE: 98304
*************************** 2. row ***************************
         SPACE: 3
          NAME: mysql/innodb_index_stats
          FLAG: 33
    ROW_FORMAT: Dynamic
     PAGE_SIZE: 16384
 ZIP_PAGE_SIZE: 0
    SPACE_TYPE: Single
 FS_BLOCK_SIZE: 4096
     FILE_SIZE: 98304
ALLOCATED_SIZE: 98304

_{This page is licensed: CC BY-SA / Gnu FDL}