Lock Monitor 与 Standard Monitor 相同，只是它包含额外的锁信息。为周期性输出启用任一监视器会打开相同的输出流，但如果启用锁定监视器，则该流包含额外信息。例如，如果启用标准监视器和锁定监视器，则会打开单个输出流。在您禁用锁定监视器之前，该流包含额外的锁定信息。

SHOW ENGINE INNODB STATUS使用该语句 生成时，标准监视器输出限制为 1MB 。此限制不适用于写入服务器标准错误输出 ( stderr) 的输出。

示例标准监视器输出：

mysql> SHOW ENGINE INNODB STATUS\G
*************************** 1. row ***************************
  Type: InnoDB
  Name:
Status:
=====================================
2014-10-17 10:33:50 7f47bcd64700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 6 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 167 srv_active, 0 srv_shutdown, 3023 srv_idle
srv_master_thread log flush and writes: 3190
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 1040
OS WAIT ARRAY INFO: signal count 959
Mutex spin waits 677, rounds 20336, OS waits 644
RW-shared spins 180, rounds 5400, OS waits 180
RW-excl spins 0, rounds 6420, OS waits 214
Spin rounds per wait: 30.04 mutex, 30.00 RW-shared, 6420.00 RW-excl
------------------------
LATEST FOREIGN KEY ERROR
------------------------
2014-10-17 09:51:31 7f47bcde6700 Transaction:
TRANSACTION 436786, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
4 lock struct(s), heap size 1184, 3 row lock(s), undo log entries 3
MySQL thread id 1, OS thread handle 0x7f47bcde6700, query id 96 localhost
root update
INSERT INTO child VALUES
    (NULL, 1)
    , (NULL, 2)
    , (NULL, 3)
    , (NULL, 4)
    , (NULL, 5)
    , (NULL, 6)
Foreign key constraint fails for table `mysql`.`child`:
,
  CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent`
  (`id`)
 ON DELETE CASCADE ON UPDATE CASCADE
Trying to add in child table, in index `par_ind` tuple:
DATA TUPLE: 2 fields;
 0: len 4; hex 80000003; asc     ;;
 1: len 4; hex 80000003; asc     ;;

But in parent table `mysql`.`parent`, in index `PRIMARY`,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 3; compact format; info bits 0
 0: len 4; hex 80000004; asc     ;;
 1: len 6; hex 00000006aa26; asc      &;;
 2: len 7; hex 9d000001610137; asc     a 7;;
------------------------
LATEST DETECTED DEADLOCK
------------------------
2014-10-17 09:52:38 7f47bcde6700
*** (1) TRANSACTION:
TRANSACTION 436801, ACTIVE 12 sec starting index read
mysql tables in use 1, locked 1
LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s)
MySQL thread id 2, OS thread handle 0x7f47bcda5700, query id 102 localhost
root updating
DELETE FROM t WHERE i = 1
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 3693 page no 3 n bits 72 index `GEN_CLUST_INDEX` of
table `mysql`.`t` trx id 436801 lock_mode X waiting
Record lock, heap no 2 PHYSICAL RECORD: n_fields 4; compact format; info
bits 0
 0: len 6; hex 000000003a00; asc     : ;;
 1: len 6; hex 00000006aa3f; asc      ?;;
 2: len 7; hex ad0000021d0110; asc        ;;
 3: len 4; hex 80000001; asc     ;;

*** (2) TRANSACTION:
TRANSACTION 436800, ACTIVE 34 sec starting index read
mysql tables in use 1, locked 1
4 lock struct(s), heap size 1184, 3 row lock(s)
MySQL thread id 1, OS thread handle 0x7f47bcde6700, query id 103 localhost
root updating
DELETE FROM t WHERE i = 1
*** (2) HOLDS THE LOCK(S):
RECORD LOCKS space id 3693 page no 3 n bits 72 index `GEN_CLUST_INDEX` of
table `mysql`.`t` trx id 436800 lock mode S
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; compact format; info
bits 0 0: len 8; hex 73757072656d756d; asc supremum;;

Record lock, heap no 2 PHYSICAL RECORD: n_fields 4; compact format; info
bits 0
 0: len 6; hex 000000003a00; asc     : ;;
 1: len 6; hex 00000006aa3f; asc      ?;;
 2: len 7; hex ad0000021d0110; asc        ;;
 3: len 4; hex 80000001; asc     ;;

*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 3693 page no 3 n bits 72 index `GEN_CLUST_INDEX` of
table `mysql`.`t` trx id 436800 lock_mode X waiting
Record lock, heap no 2 PHYSICAL RECORD: n_fields 4; compact format; info
bits 0
 0: len 6; hex 000000003a00; asc     : ;;
 1: len 6; hex 00000006aa3f; asc      ?;;
 2: len 7; hex ad0000021d0110; asc        ;;
 3: len 4; hex 80000001; asc     ;;

*** WE ROLL BACK TRANSACTION (1)
------------
TRANSACTIONS
------------
Trx id counter 437661
Purge done for trx's n:o < 437657 undo n:o < 0 state: running but
idle History list length 371
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 10, OS thread handle 0x7f47bcd64700, query id 1001 localhost
root init
SHOW ENGINE INNODB STATUS
---TRANSACTION 436801, not started
MySQL thread id 2, OS thread handle 0x7f47bcda5700, query id 102 localhost
root ceaning up
---TRANSACTION 437660, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
43 lock struct(s), heap size 6544, 6474 row lock(s), undo log entries 7124
MySQL thread id 14, OS thread handle 0x7f47bcde6700, query id 1000 localhost
root update
INSERT INTO `dept_emp` VALUES (100258,'d002','1994-03-21','9999-01-01'),
(100259, 'd005','1998-11-04','9999-01-01'),(100259,'d008','1988-02-03',
'1998-11-04'),(100 260,'d005','1998-09-18','9999-01-01'),(100261,'d004',
'1989-03-11','9999-01-01'), (100262,'d008','1996-08-12','9999-01-01'),
(100263,'d002','1998-06-24','1998-10-0 5'),(100264,'d005','1989-11-09',
'9999-01-01'),(100265,'d001','1992-06-27','9999- 01-01'),(100266,'d009',
'1990-09-10','9999-01-01'),(100267,'d009','1992-04-14','9 999-01-01'),
(100268,'d005','1998-05-01','2000-04-07'),(100269,'d007','1994-01-02',
'1999-09-18'),(100269,'d009','1999-09-
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (write thread)
Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] ,
 ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
344 OS file reads, 45666 OS file writes, 4030 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 202.80 writes/s, 48.33 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
 insert 0, delete mark 0, delete 0
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 4425293, node heap has 143 buffer(s)
137083.82 hash searches/s, 2495.92 non-hash searches/s
---
LOG
---
Log sequence number 3091027710
Log flushed up to   3090240098
Pages flushed up to 3074432960
Last checkpoint at  3050856266
0 pending log writes, 0 pending chkp writes
1187 log i/o's done, 14.67 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 2197815296; in additional pool allocated 0
Dictionary memory allocated 155455
Buffer pool size   131071
Free buffers       92158
Database pages     38770
Old database pages 14271
Modified db pages  619
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 4, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 322, created 38448, written 42083
0.00 reads/s, 222.30 creates/s, 159.47 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead
0.00/s
LRU len: 38770, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
----------------------
INDIVIDUAL BUFFER POOL INFO
----------------------
---BUFFER POOL 0
Buffer pool size   65536
Free buffers       46120
Database pages     19345
Old database pages 7121
Modified db pages  291
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 3, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 163, created 19182, written 21149
0.00 reads/s, 103.48 creates/s, 83.15 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead
0.00/s
LRU len: 19345, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 1
Buffer pool size   65535
Free buffers       46038
Database pages     19425
Old database pages 7150
Modified db pages  328
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 159, created 19266, written 20934
0.00 reads/s, 118.81 creates/s, 76.32 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead
0.00/s
LRU len: 19425, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Main thread process no. 54607, id 139946075744000, state: sleeping
Number of rows inserted 12163964, updated 0, deleted 3, read 4
67807.03 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================