Information Schema INNODB_TABLESPACES_SCRUBBING Table
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:
| Column | Description |
|---|---|
SPACE | InnoDB table space id number. |
NAME | Path to the table space file, without the extension. |
COMPRESSED | The compressed page size, or zero if uncompressed. |
LAST_SCRUB_COMPLETED | Date and time when the last scrub was completed, or NULL if never been performed. |
CURRENT_SCRUB_STARTED | Date and time when the current scrub started, or NULL if never been performed. |
CURRENT_SCRUB_ACTIVE_THREADS | Number of threads currently scrubbing the tablespace. |
CURRENT_SCRUB_PAGE_NUMBER | Page that the scrubbing thread is currently scrubbing, or NULL if not enabled. |
CURRENT_SCRUB_MAX_PAGE_NUMBER | When a scrubbing starts rotating a table space, the field contains its current size. NULL if not enabled. |
ON_SSD | The 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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