還可以通過設(shè)置InnDB Monitors來進(jìn)一步觀察鎖沖突詳細(xì)信息 設(shè)置InnoDB Monitors方法 建立test庫 mysql>create database test; Query OK, 1 row affected (0.20 sec) mysql> use test Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A
可以通過show engine innodb status命令查看死鎖信息 mysql> show engine innodb status /G *************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 2018-05-10 09:17:10 0x7f1fbc21a700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 46 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 53 srv_active, 0 srv_shutdown, 240099 srv_idle srv_master_thread log flush and writes: 0 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 2007 OS WAIT ARRAY INFO: signal count 1987 RW-shared spins 3878, rounds 5594, OS waits 1735 RW-excl spins 3, rounds 91, OS waits 4 RW-sx spins 1, rounds 30, OS waits 1 Spin rounds per wait: 1.44 RW-shared, 30.33 RW-excl, 30.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 78405 Purge done for trx's n:o < 78404 undo n:o < 10 state: running but idle History list length 21 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 421249967052640, not started 0 lock struct(s), heap size 1136, 0 row lock(s) -------- 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)
