FLUSH STATUS
此语句为兼容 MySQL 而设计。它在 TiDB 中没有任何效果，TiDB 使用 Prometheus 和 Grafana 进行集中式指标收集，而不是 SHOW STATUS。
概要
- FlushStmt
- NoWriteToBinLogAliasOpt
- FlushOption
FlushStmt ::=
'FLUSH' NoWriteToBinLogAliasOpt FlushOption
NoWriteToBinLogAliasOpt ::=
( 'NO_WRITE_TO_BINLOG' | 'LOCAL' )?
FlushOption ::=
'PRIVILEGES'
| 'STATUS'
| 'TIDB' 'PLUGINS' PluginNameList
| 'HOSTS'
| LogTypeOpt 'LOGS'
| TableOrTables TableNameListOpt WithReadLockOpt
示例
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 兼容性
- 此语句与 MySQL 兼容。