mysql> show processlist;
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
| 1 | repl | linfytest3:57368 | NULL | Binlog Dump | 20957 | Master has sent all binlog to slave; waiting for binlog to be updated | NULL |
| 2 | root | localhost | linfy | Query | 2359 | Waiting for table metadata lock | alter table t_idb_big change is_nullable nullable varchar(3), algorithm=copy |
| 3 | root | localhost | information_schema | Query | 0 | init | show processlist |
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
3 rows in set (0.00 sec)
mysql> kill 2;
Query OK, 0 rows affected (0.01 sec)
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
| 1 | repl | linfytest3:57368 | NULL | Binlog Dump | 20957 | Master has sent all binlog to slave; waiting for binlog to be updated | NULL |
| 2 | root | localhost | linfy | Query | 2359 | Waiting for table metadata lock | alter table t_idb_big change is_nullable nullable varchar(3), algorithm=copy |
| 3 | root | localhost | information_schema | Query | 0 | init | show processlist |
+----+------+------------------+--------------------+-------------+-------+-----------------------------------------------------------------------+------------------------------------------------------------------------------+
3 rows in set (0.00 sec)
mysql> kill 2;
Query OK, 0 rows affected (0.01 sec)
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/543979/viewspace-1730382/ ，如需转载，请注明出处，否则将追究法律责任。
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