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mysql 데이터베이스에서 두 개의 트랜잭션이 실행 중이며 어떤 것도 진행되지 않습니다. 양쪽 다 약간의 자물쇠를 잡는다. 그러나 내가 알고있는 한 그들이 충돌하지 않는다. 두 트랜잭션의 상태는 "ACTIVE"입니다 (둘 중 하나가 다른 트랜잭션에 의해 차단 된 경우 해당 트랜잭션 중 하나가 대기 상태 일 것으로 예상됩니다).두 트랜잭션이 서로를 차단하는 것 같지만 아무도 대기하지 않습니다.
나는 innodb 상태 출력 (잠금 모니터 정보 포함)의 "TRANSACTIONS"및 "ROW OPERATIONS"부분을 아래에 첨부했습니다.
이 거래가 왜 서로에게 영향을 미치는지에 대한 힌트를 줄 수 있습니까?
EJB 응용 프로그램에서 쿼리를 실행하기 때문에 쉽게 재현 할 수 없기 때문에 일반적으로 이런 종류의 문제가 일반적으로 발생하는지 이해하려고합니다. MySQL의에서
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100823 16:04:53 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 1 seconds
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 25808, signal count 25608
Mutex spin waits 0, rounds 108338, OS waits 1400
RW-shared spins 18372, OS waits 17512; RW-excl spins 7055, OS waits 6782
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TRANSACTIONS
------------
Trx id counter 0 39456296
Purge done for trx's n:o < 0 39455079 undo n:o < 0 0
History list length 2
Total number of lock structs in row lock hash table 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0 39456295, not started, process no 4183, OS thread id 140415939369296
MySQL thread id 21, query id 90163 localhost 127.0.0.1 root
---TRANSACTION 0 0, not started, process no 4183, OS thread id 140415938767184
MySQL thread id 15, query id 89364 cl1010wo2431.inter.rsag.site 172.27.10.38 root
---TRANSACTION 0 0, not started, process no 4183, OS thread id 140415939168592
MySQL thread id 8, query id 90177 localhost root
---TRANSACTION 0 39456204, ACTIVE 94 sec, process no 4183, OS thread id 140415938967888
3 lock struct(s), heap size 368, undo log entries 1
MySQL thread id 23, query id 89811 localhost 127.0.0.1 root
Trx read view will not see trx with id >= 0 39456205, sees < 0 39454738
TABLE LOCK table `server_database/error_data` trx id 0 39456204 lock mode IX
TABLE LOCK table `server_database/error_status` trx id 0 39456204 lock mode IS
RECORD LOCKS space id 2754 page no 3 n bits 72 index `PRIMARY` of table `server_database/error_status` trx id 0 39456204 lock mode S locks rec but not gap
Record lock, heap no 6 PHYSICAL RECORD: n_fields 4; compact format; info bits 0
0: len 3; hex 800001; asc ;; 1: len 6; hex 000000d7287f; asc (;; 2: len 7; hex 00000030c816ce; asc 0 ;; 3: len 9; hex 7374617475734e6577; asc statusNew;;
Aug 23 16:04:53 sv1010vm0007 mysqld[4184]:
---TRANSACTION 0 39454738, ACTIVE 1594 sec, process no 4183, OS thread id 140416557721936
6 lock struct(s), heap size 1216, undo log entries 5
MySQL thread id 24, query id 83802 localhost 127.0.0.1 root
Trx read view will not see trx with id >= 0 39454739, sees < 0 39454739
TABLE LOCK table `server_database/error_data` trx id 0 39454738 lock mode IX
TABLE LOCK table `server_database/error_status` trx id 0 39454738 lock mode IS
RECORD LOCKS space id 2754 page no 3 n bits 72 index `PRIMARY` of table `server_database/error_status` trx id 0 39454738 lock mode S locks rec but not gap
Record lock, heap no 6 PHYSICAL RECORD: n_fields 4; compact format; info bits 0
0: len 3; hex 800001; asc ;; 1: len 6; hex 000000d7287f; asc (;; 2: len 7; hex 00000030c816ce; asc 0 ;; 3: len 9; hex 7374617475734e6577; asc statusNew;;
Aug 23 16:04:53 sv1010vm0007 mysqld[4184]:
TABLE LOCK table `server_database/wtu_counter_daily` trx id 0 39454738 lock mode IX
TABLE LOCK table `server_database/wtu` trx id 0 39454738 lock mode IS
RECORD LOCKS space id 4349 page no 3 n bits 128 index `PRIMARY` of table `server_database/wtu` trx id 0 39454738 lock mode S locks rec but not gap
Record lock, heap no 62 PHYSICAL RECORD: n_fields 32; compact format; info bits 0
0: len 3; hex 802715; asc ' ;; 1: len 6; hex 00000258fa7b; asc X {;; 2: len 7; hex 000000003401e8; asc 4 ;; 3: SQL NULL; 4: len 3; hex 800005; asc ;; 5: len 12; hex 31302e37372e33322e313830; asc 10.77.32.180;; 6: len 4; hex 00000040; asc @;; 7: SQL NULL; 8: SQL NULL; 9: SQL NULL; 10: len 3; hex 8004d2; asc ;; 11: len 1; hex 37; asc 7;; 12: len 0; hex ; asc ;; 13: len 1; hex 80; asc ;; 14: len 1; hex 80; asc ;; 15: SQL NULL; 16: SQL NULL; 17: len 1; hex 35; asc 5;; 18: SQL NULL; 19: len 12; hex 77656273746172742e6a6e6c; asc webstart.jnl;; 20: SQL NULL; 21: len 1; hex 80; asc ;; 22: len 1; hex 81; asc ;; 23: len 1; hex 81; asc ;; 24: len 1; hex 80; asc ;; 25: len 2; hex 8000; asc ;; 26: len 13; hex 3139322e3136382e302e313830; asc 192.168.0.180;; 27: len 1; hex 81; asc ;; 28: SQL NULL; 29: len 4; hex 80000000; asc ;; 30: len 1; hex 81; asc ;; 31: SQL NULL;
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
3 read views open inside InnoDB
Main thread process no. 4183, id 140415947962704, state: waiting for server activity
Number of rows inserted 64, updated 450, deleted 0, read 89832081
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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