结论: blocking_query 是当前堵塞其他会话正在运行的SQL.而不是原始堵塞SQL

查看当前session线程号
mysql>  select connection_id(); 
+-----------------+
| connection_id() |
+-----------------+
|              28 |
+-----------------+
1 row in set (0.02 sec)



Session 1:

Vsftp:/root#  mysql -uroot -p1234567 -e " show processlist"
Warning: Using a password on the command line interface can be insecure.
+----+------+-----------+------+---------+------+-------+------------------+
| Id | User | Host      | db   | Command | Time | State | Info             |
+----+------+-----------+------+---------+------+-------+------------------+
| 17 | root | localhost | zjzc | Sleep   |    0 |       | NULL             |


mysql 进程1737
root      1737   979  0 13:02 pts/1    00:00:00 mysql -uroot -px xxxxx


mysql> start transaction;
Query OK, 0 rows affected (0.00 sec)

mysql> delete from test where id=1;
Query OK, 1 row affected (0.00 sec)


Session 2:


| 28 | root | localhost | zjzc | Sleep   |    2 |       | NULL  


查看堵塞:
 mysql[192.168.11.187]   blocking_thread[17] blocking_query[]  blocking waiting_thread[28]'s delete from test where id=1

mysql> SELECT 
    ->     r.trx_id waiting_trx_id,
    ->     r.trx_mysql_thread_id waiting_thread,
    ->     r.trx_query waiting_query,
    ->     b.trx_id blocking_trx_id,
    ->     b.trx_mysql_thread_id blocking_thread,
    ->     b.trx_query blocking_query
    -> FROM
    ->     information_schema.innodb_lock_waits w
    ->         INNER JOIN
    ->     information_schema.innodb_trx b ON b.trx_id = w.blocking_trx_id
    ->         INNER JOIN
    ->     information_schema.innodb_trx r ON r.trx_id = w.requesting_trx_id;
+----------------+----------------+-----------------------------+-----------------+-----------------+----------------+
| waiting_trx_id | waiting_thread | waiting_query               | blocking_trx_id | blocking_thread | blocking_query |
+----------------+----------------+-----------------------------+-----------------+-----------------+----------------+
| 112076626      |             28 | delete from test where id=1 | 112076625       |              17 | NULL           |
+----------------+----------------+-----------------------------+-----------------+-----------------+----------------+
1 row in set (0.00 sec)



Session 1:运行
mysql> select * from ClientActionTrack20151125

 mysql[192.168.11.187]   blocking_thread[17] blocking_query[select * from ClientActionTrack20151125]  blocking waiting_thread[28]'s delete from test where id=1

mysql> SELECT      r.trx_id waiting_trx_id,     r.trx_mysql_thread_id waiting_thread,     r.trx_query waiting_query,     b.trx_id blocking_trx_id,     b.trx_mysql_thread_id blocking_thread,     b.trx_query blocking_query FROM     information_schema.innodb_lock_waits w         INNER JOIN     information_schema.innodb_trx b ON b.trx_id = w.blocking_trx_id         INNER JOIN     information_schema.innodb_trx r ON r.trx_id = w.requesting_trx_id;
+----------------+----------------+-----------------------------+-----------------+-----------------+-----------------------------------------+
| waiting_trx_id | waiting_thread | waiting_query               | blocking_trx_id | blocking_thread | blocking_query                          |
+----------------+----------------+-----------------------------+-----------------+-----------------+-----------------------------------------+
| 112076626      |             28 | delete from test where id=1 | 112076625       |              17 | select * from ClientActionTrack20151125 |
+----------------+----------------+-----------------------------+-----------------+-----------------+-----------------------------------------+
1 row in set (0.39 sec)



结论: blocking_query 是当前堵塞其他会话正在运行的SQL.而不是原始堵塞SQL