INFORMATION_SCHEMA.INNODB_LOCKS

INNODB_LOCKS Table:  INNODB_LOCKS 表 包含信息关于每个锁 一个InnoDB 事务已经请求 但是没有获得锁,

每个lock 一个事务持有是堵塞另外一个事务

centos6.5:/root/mysql-5.6.22#mysql -uroot -p'kjk123123' -h192.168.11.185 -e"select * from  INFORMATION_SCHEMA.INNODB_TRX\G "
Warning: Using a password on the command line interface can be insecure.
*************************** 1. row ***************************
                    trx_id: 5460
                 trx_state: LOCK WAIT
               trx_started: 2016-11-22 15:02:18
     trx_requested_lock_id: 5460:14:3:2
          trx_wait_started: 2016-11-22 15:02:18
                trx_weight: 2
       trx_mysql_thread_id: 1404
                 trx_query: delete  from test where username='admin'
       trx_operation_state: starting index read
         trx_tables_in_use: 1
         trx_tables_locked: 1
          trx_lock_structs: 2
     trx_lock_memory_bytes: 360
           trx_rows_locked: 1
         trx_rows_modified: 0
   trx_concurrency_tickets: 0
       trx_isolation_level: REPEATABLE READ
         trx_unique_checks: 1
    trx_foreign_key_checks: 1
trx_last_foreign_key_error: NULL
 trx_adaptive_hash_latched: 0
 trx_adaptive_hash_timeout: 10000
          trx_is_read_only: 0
trx_autocommit_non_locking: 0
*************************** 2. row ***************************
                    trx_id: 5453
                 trx_state: RUNNING
               trx_started: 2016-11-22 14:01:14
     trx_requested_lock_id: NULL
          trx_wait_started: NULL
                trx_weight: 3
       trx_mysql_thread_id: 1367
                 trx_query: NULL
       trx_operation_state: NULL
         trx_tables_in_use: 0
         trx_tables_locked: 0
          trx_lock_structs: 2
     trx_lock_memory_bytes: 360
           trx_rows_locked: 4
         trx_rows_modified: 1
   trx_concurrency_tickets: 0
       trx_isolation_level: REPEATABLE READ
         trx_unique_checks: 1
    trx_foreign_key_checks: 1
trx_last_foreign_key_error: NULL
 trx_adaptive_hash_latched: 0
 trx_adaptive_hash_timeout: 10000
          trx_is_read_only: 0
trx_autocommit_non_locking: 0

centos6.5:/root/mysql-5.6.22#mysql -uroot -p'kjk123123' -h192.168.11.185 -e"select * from  INFORMATION_SCHEMA.INNODB_LOCKS\G "
Warning: Using a password on the command line interface can be insecure.
*************************** 1. row ***************************
    lock_id: 5460:14:3:2
lock_trx_id: 5460
  lock_mode: X
  lock_type: RECORD
 lock_table: `DEVOPS`.`test`
 lock_index: GEN_CLUST_INDEX
 lock_space: 14
  lock_page: 3
   lock_rec: 2
  lock_data: 0x000000000218
*************************** 2. row ***************************
    lock_id: 5453:14:3:2
lock_trx_id: 5453
  lock_mode: X
  lock_type: RECORD
 lock_table: `DEVOPS`.`test`
 lock_index: GEN_CLUST_INDEX
 lock_space: 14
  lock_page: 3
   lock_rec: 2
  lock_data: 0x000000000218

centos6.5:/root/mysql-5.6.22#mysql -uroot -p'kjk123123' -h192.168.11.185 -e"show processlist"
Warning: Using a password on the command line interface can be insecure.
+------+------+----------------------+--------+---------+------+----------+------------------------------------------+
| Id   | User | Host                 | db     | Command | Time | State    | Info                                     |
+------+------+----------------------+--------+---------+------+----------+------------------------------------------+
| 1367 | root | 192.168.11.186:40366 | DEVOPS | Sleep   | 3905 |          | NULL                                     |
| 1404 | root | 192.168.11.186:46149 | DEVOPS | Query   |    4 | updating | delete  from test where username='admin' |
| 1413 | root | 10.10.11.191:54394   | NULL   | Sleep   |  519 |          | NULL                                     |
| 1414 | root | 10.10.11.191:54395   | NULL   | Sleep   |  519 |          | NULL                                     |
| 1461 | root | 192.168.11.185:49157 | NULL   | Query   |    0 | init     | show processlist                         |
+------+------+----------------------+--------+---------+------+----------+------------------------------------------+

INNODB_LOCKS Columns:

LOCK_ID  唯一的lock ID 号,内部与InnoDB.

对待它作为一个不透明的字符串。

虽然 LOCK_ID 当前包含TRX_ID

LOCK_TRX_ID  事务持有锁的的ID 得到关于事务的详细信息,关联这个列和INNODB_TRX 表的TRX_ID