MySQL死锁问题分析及解决方法实例详解

(1) TRANSACTION: 
TRANSACTION 0 677833455, ACTIVE 0 sec, process no 11393, OS thread id 278546 starting index read 
mysql tables in use 1, locked 1 
LOCK WAIT 3 lock struct(s), heap size 320 
MySQL thread id 83, query id 162348740 dc03 dc Searching rows for update 
update tab_test set state=1064,time=now() where state=1061 and time < date_sub(now(), INTERVAL 30 minute) （任务1的sql语句） 
(1) WAITING FOR THIS LOCK TO BE GRANTED: （任务1等待的索引记录） 
RECORD LOCKS space id 0 page no 849384 n bits 208 index `PRIMARY` of table `db/tab_test` trx id 0 677833455 _mode X locks rec but not gap waiting 
Record lock, heap no 92 PHYSICAL RECORD: n_fields 11; pact format; info bits 0 
0: len 8; hex 800000000097629c; asc b ;; 1: len 6; hex 00002866eaee; asc (f ;; 2: len 7; hex 00000d40040110; asc @ ;; 3: len 8; hex 80000000000050b2; asc P ;; 4: len 8; hex 800000000000502a; asc P;; 5: len 8; hex 8000000000005426; asc T&;; 6: len 8; hex 800012412c66d29c; asc A,f ;; 7: len 23; hex 75706c6f6164666972652e636f6d2f6 8616e642e706870; asc xxx./;; 8: len 8; hex 800000000000042b; asc +;; 9: len 4; hex 474bfa2b; asc GK +;; 10: len 8; hex 8000000000004e24; asc N$;; 
 (2) TRANSACTION: 
TRANSACTION 0 677833454, ACTIVE 0 sec, process no 11397, OS thread id 344086 updating or deleting, thread declared inside InnoDB 499 
mysql tables in use 1, locked 1 
3 lock struct(s), heap size 320, undo log entries 1 
MySQL thread id 84, query id 162348739 dc03 dc Updating update tab_test set state=1067,time=now () where id in (9921180) （任务2的sql语句） 
 (2) HOLDS THE LOCK(S): （任务2已获得的锁） 
RECORD LOCKS space id 0 page no 849384 n bits 208 index `PRIMARY` of table `db/tab_test` trx id 0 677833454 lock_mode X locks rec but not gap 
Record lock, heap no 92 PHYSICAL RECORD: n_fields 11; pact format; info bits 0 
0: len 8; hex 800000000097629c; asc b ;; 1: len 6; hex 00002866eaee; asc (f ;; 2: len 7; hex 00000d40040110; asc @ ;; 3: len 8; hex 80000000000050b2; asc P ;; 4: len 8; hex 800000000000502a; asc P;; 5: len 8; hex 8000000000005426; asc T&;; 6: len 8; hex 800012412c66d29c; asc A,f ;; 7: len 23; hex 75706c6f6164666972652e636f6d2f6 8616e642e706870; asc uploadfire./hand.php;; 8: len 8; hex 800000000000042b; asc +;; 9: len 4; hex 474bfa2b; asc GK +;; 10: len 8; hex 8000000000004e24; asc N$;; 
 (2) WAITING FOR THIS LOCK TO BE GRANTED: （任务2等待的锁） 
RECORD LOCKS space id 0 page no 843102 n bits 600 index `idx_1` of table `db/tab_test` trx id 0 677833454 lock_mode X locks rec but not gap waiting  
Record lock, heap no 395 PHYSICAL RECORD: n_fields 3; pact format; info bits 0 
0: len 8; hex 8000000000000425; asc %;; 1: len 8; hex 800012412c66d29c; asc A,f ;; 2: len 8; hex 800000000097629c; asc b ;; 
 WE ROLL BACK TRANSACTION (1) 
（回滚了任务1，以解除死锁）

select id from tab_test where state=1061 and time < date_sub(now(), INTERVAL 30 minute); 
update tab_test state=1064,time=now() where id in(......);