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TABLE_STORAGE_STATS

The TABLE_STORAGE_STATS table provides information about table sizes as stored by the storage engine (TiKV).

USE INFORMATION_SCHEMA; DESC TABLE_STORAGE_STATS;

The output is as follows:

+--------------------+-------------+------+------+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------------+-------------+------+------+---------+-------+ | TABLE_SCHEMA | varchar(64) | YES | | NULL | | | TABLE_NAME | varchar(64) | YES | | NULL | | | TABLE_ID | bigint(21) | YES | | NULL | | | PEER_COUNT | bigint(21) | YES | | NULL | | | REGION_COUNT | bigint(21) | YES | | NULL | | | EMPTY_REGION_COUNT | bigint(21) | YES | | NULL | | | TABLE_SIZE | bigint(64) | YES | | NULL | | | TABLE_KEYS | bigint(64) | YES | | NULL | | +--------------------+-------------+------+------+---------+-------+ 8 rows in set (0.00 sec)
CREATE TABLE test.t1 (id INT); INSERT INTO test.t1 VALUES (1); SELECT * FROM TABLE_STORAGE_STATS WHERE table_schema = 'test' AND table_name = 't1'\G

The output is as follows:

*************************** 1. row *************************** TABLE_SCHEMA: test TABLE_NAME: t1 TABLE_ID: 56 PEER_COUNT: 1 REGION_COUNT: 1 EMPTY_REGION_COUNT: 1 TABLE_SIZE: 1 TABLE_KEYS: 0 1 row in set (0.00 sec)

Fields in the TABLE_STORAGE_STATS table are described as follows:

  • TABLE_SCHEMA: The name of the schema to which the table belongs.
  • TABLE_NAME: The name of the table.
  • TABLE_ID: The ID of the table.
  • PEER_COUNT: The number of replicas of the table.
  • REGION_COUNT: The number of Regions.
  • EMPTY_REGION_COUNT: The number of Regions that do not contain data in this table.
  • TABLE_SIZE: The total size of the table, in the unit of MiB.
  • TABLE_KEYS: The total number of records in the table.

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