The Ultimate Guide to High Availability with MariaDB
This is a read-only copy of the MariaDB Knowledgebase generated on 2024-11-14. For the latest, interactive version please visit https://mariadb.com/kb/.

Information Schema INNODB_SYS_TABLESPACES Table

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:

ColumnDescription
SPACEUnique InnoDB tablespace identifier.
NAMEDatabase and table name separated by a backslash, or the uppercase InnoDB system table name.
FLAG1 if a DATA DIRECTORY option has been specified in CREATE TABLE, otherwise 0.
FILE_FORMATInnoDB file format. Removed in MariaDB 10.3.1
ROW_FORMATInnoDB 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_SIZEPage 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_SIZEZip page size for this tablespace. Removed in MariaDB 10.6.0.
SPACE_TYPETablespace type. Can be General for general tablespaces or Single for file-per-table tablespaces. Introduced MariaDB 10.2.1. Removed MariaDB 10.5.0.
FS_BLOCK_SIZEFile system block size. Introduced MariaDB 10.2.1.
FILE_SIZEMaximum size of the file, uncompressed. Introduced MariaDB 10.2.1.
ALLOCATED_SIZEActual size of the file as per space allocated on disk. Introduced MariaDB 10.2.1.
FILENAMETablespace datafile path, previously part of the INNODB_SYS_DATAFILES table. Added in MariaDB 10.6.0.

Examples

MariaDB 10.4:

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       |       |
+----------------+---------------------+------+-----+---------+-------+

From MariaDB 10.4:

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
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.