Information Schema INNODB_TABLESPACES_SCRUBBING Table

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MariaDB 10.1.3 - 10.5.1

InnoDB and XtraDB data scrubbing was introduced in MariaDB 10.1.3. The table was removed in MariaDB 10.5.2 - see MDEV-15528.

The Information Schema INNODB_TABLESPACES_SCRUBBING table contains data scrubbing information.

The PROCESS privilege is required to view the table.

It has the following columns:

ColumnDescription
SPACEInnoDB table space id number.
NAMEPath to the table space file, without the extension.
COMPRESSEDThe compressed page size, or zero if uncompressed.
LAST_SCRUB_COMPLETEDDate and time when the last scrub was completed, or NULL if never been performed.
CURRENT_SCRUB_STARTEDDate and time when the current scrub started, or NULL if never been performed.
CURRENT_SCRUB_ACTIVE_THREADSNumber of threads currently scrubbing the tablespace.
CURRENT_SCRUB_PAGE_NUMBERPage that the scrubbing thread is currently scrubbing, or NULL if not enabled.
CURRENT_SCRUB_MAX_PAGE_NUMBERWhen a scrubbing starts rotating a table space, the field contains its current size. NULL if not enabled.
ON_SSDThe field contains 1 when MariaDB detects that the table space is on a SSD based storage. 0 if not SSD or it could not be determined (since MariaDB 10.4.4)

Example

SELECT * FROM information_schema.INNODB_TABLESPACES_SCRUBBING LIMIT 1\G
*************************** 1. row ***************************
                        SPACE: 1
                         NAME: mysql/innodb_table_stats
                   COMPRESSED: 0
         LAST_SCRUB_COMPLETED: NULL
        CURRENT_SCRUB_STARTED: NULL
    CURRENT_SCRUB_PAGE_NUMBER: NULL
CURRENT_SCRUB_MAX_PAGE_NUMBER: 0
         ROTATING_OR_FLUSHING: 0
1 rows in set (0.00 sec)

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