使用 mysqladmin debug 查看死锁信息

使用 mysqladmin debug 查看死锁信息

mysqladmin -S /mysql/data/mysql.sock debug

然后在error日志中，会看到：

 11 lock struct(s), heap size 1136, 3 row lock(s)
 MySQL thread id 118, OS thread handle 139642778605312, query id 8319501 10.244.112.57 selffabu updating
 UPDATE T_QUICK_AUTHENTICATE_2
 SET BANK_AUTH_ID = '375979145974259712'
 WHERE ACCOUNT_NO = '0000000001118278650'
         AND RCS_CODE = 'SNB_DEBIT_QUICKPAYMENT_SNB'
         AND E_ACCOUNT_NO = '73A95146EFEC060C00BE87C9A0F8475A04F2587F77F8765A15FACDF017516B26'
         AND STATUS = '1'
 2018-04-17T14:20:43.609234+08:00 118 [Note] InnoDB: *** (2) HOLDS THE LOCK(S):

 RECORD LOCKS space id 531 page no 12 n bits 112 index PRIMARY of table `eppsmfcspst3`.`t_quick_authenticate_2` trx id 3346118 lock_mode X locks rec but not gap
 2018-04-17T14:20:43.609253+08:00 118 [Note] InnoDB: *** (2) WAITING FOR THIS LOCK TO BE GRANTED:

 2018-04-17T14:20:43.609271+08:00 118 [Note] InnoDB: *** WE ROLL BACK TRANSACTION (2)

 2018-04-17T14:50:45.134703+08:00 82 [Note] Aborted connection 82 to db: 'eppsmfcspst3' user: 'selffabu' host: '10.244.112.57' (Got an error reading communication packets)

 Status information:

 Current dir: /mysql/data/
 Running threads: 24  Stack size: 524288
 Current locks:
 lock: 0x7f00f334ef80:

 lock: 0x7f0145559b80:

 lock: 0x1eca220:

 ...

 lock: 0x1ec7f20:

 lock: 0x1ec7fe0:

 lock: 0x1ec80a0:

 lock: 0x1ec98c0:

 Key caches:
 default
 Buffer_size:        524288
 Block_size:           1024
 Division_limit:        100
 Age_limit:             300
 blocks used:             5
 not flushed:             0
 w_requests:              0
 writes:                  0
 r_requests:             38
 reads:                   7

 handler status:
 read_key:      7990705
 read_next:    26343225
 read_rnd       2711415
 read_first:        802
 write:         4191983
 delete               0
 update:           8747

 Table status:
 Opened tables:       7479
 Open tables:         4096
 Open files:             7
 Open streams:           0

 Memory status:
 <malloc version="1">
 <heap nr="0">
 <sizes>
 <unsorted from="18446744069414584320" to="0" total="0" count="139651666878392"/>
 </sizes>
 <total type="fast" count="0" size="0"/>
 <total type="rest" count="0" size="0"/>
 <system type="current" size="0"/>
 <system type="max" size="0"/>
 <aspace type="total" size="0"/>
 <aspace type="mprotect" size="0"/>
 </heap>
 <total type="fast" count="0" size="0"/>
 <total type="rest" count="0" size="0"/>
 <total type="mmap" count="0" size="0"/>
 <system type="current" size="0"/>
 <system type="max" size="0"/>
 <aspace type="total" size="0"/>
 <aspace type="mprotect" size="0"/>
 </malloc>

 Events status:
 LLA = Last Locked At  LUA = Last Unlocked At
 WOC = Waiting On Condition  DL = Data Locked

 Event scheduler status:
 State      : INITIALIZED
 Thread id  : 0
 LLA        : n/a:0
 LUA        : n/a:0
 WOC        : NO
 Workers    : 0
 Executed   : 0
 Data locked: NO

 Event queue status:
 Element count   : 0
 Data locked     : NO
 Attempting lock : NO
 LLA             : init_queue:96
 LUA             : init_queue:104
 WOC             : NO