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FLUSH STATUS | TiDB SQL Statement Reference
An overview of the usage of FLUSH STATUS for the TiDB database.
/docs/dev/sql-statements/sql-statement-flush-status/
/docs/dev/reference/sql/statements/flush-status/

FLUSH STATUS

This statement is included for compatibility with MySQL. It has no effect on TiDB, which uses Prometheus and Grafana for centralized metrics collection instead of SHOW STATUS.

Synopsis

FlushStmt ::=
    'FLUSH' NoWriteToBinLogAliasOpt FlushOption

NoWriteToBinLogAliasOpt ::=
    ( 'NO_WRITE_TO_BINLOG' | 'LOCAL' )?

FlushOption ::=
    'PRIVILEGES'
|   'STATUS'
|    'TIDB' 'PLUGINS' PluginNameList
|    'HOSTS'
|   LogTypeOpt 'LOGS'
|   TableOrTables TableNameListOpt WithReadLockOpt

Examples

mysql> show status;
+--------------------+--------------------------------------+
| Variable_name      | Value                                |
+--------------------+--------------------------------------+
| Ssl_cipher_list    |                                      |
| server_id          | 93e2e07d-6bb4-4a1b-90b7-e035fae154fe |
| ddl_schema_version | 141                                  |
| Ssl_verify_mode    | 0                                    |
| Ssl_version        |                                      |
| Ssl_cipher         |                                      |
+--------------------+--------------------------------------+
6 rows in set (0.01 sec)

mysql> show global status;
+--------------------+--------------------------------------+
| Variable_name      | Value                                |
+--------------------+--------------------------------------+
| Ssl_cipher         |                                      |
| Ssl_cipher_list    |                                      |
| Ssl_verify_mode    | 0                                    |
| Ssl_version        |                                      |
| server_id          | 93e2e07d-6bb4-4a1b-90b7-e035fae154fe |
| ddl_schema_version | 141                                  |
+--------------------+--------------------------------------+
6 rows in set (0.00 sec)

mysql> flush status;
Query OK, 0 rows affected (0.00 sec)

mysql> show status;
+--------------------+--------------------------------------+
| Variable_name      | Value                                |
+--------------------+--------------------------------------+
| Ssl_cipher         |                                      |
| Ssl_cipher_list    |                                      |
| Ssl_verify_mode    | 0                                    |
| Ssl_version        |                                      |
| ddl_schema_version | 141                                  |
| server_id          | 93e2e07d-6bb4-4a1b-90b7-e035fae154fe |
+--------------------+--------------------------------------+
6 rows in set (0.00 sec)

MySQL compatibility

  • This statement is compatible with MySQL.

See also