查看 mysql 数据库连接数、并发数相关信息
mysql> show status like 'Thread%'; +-------------------+-------+ | Variable_name | Value | +-------------------+-------+ | Threads_cached | 6 | | Threads_connected | 1 | | Threads_created | 7 | | Threads_running | 1 | +-------------------+-------+ 4 rows in set (0.01 sec)
mysql> show variables like '%connect%'; +-----------------------------------------------+-----------------+ | Variable_name | Value | +-----------------------------------------------+-----------------+ | character_set_connection | utf8 | | collation_connection | utf8_general_ci | | connect_timeout | 10 | | disconnect_on_expired_password | ON | | init_connect | | | max_connect_errors | 100 | | max_connections | 151 | | max_user_connections | 0 | | performance_schema_session_connect_attrs_size | 512 | +-----------------------------------------------+-----------------+ 9 rows in set (0.00 sec)