根据MySQL锁监视器这篇文章来操作。
准备条件：大于5.6.16版本的MySQL，登录mysql
开启
set GLOBAL innodb_status_output=ON; set GLOBAL innodb_status_output_locks=ON;
新增、修改表。
mysql> show create table my_test1_0G *************************** 1. row *************************** Table: my_test1_0 Create Table: CREATE TABLE `my_test1_0` ( `id` int(11) NOT NULL, `col2` int(11) DEFAULT NULL, `col3` varchar(64) DEFAULT NULL, `col4` varchar(10) DEFAULT NULL, `col5` varchar(64) DEFAULT NULL, PRIMARY KEY (`id`), KEY `idx_col2` (`col2`), KEY `idx_col3_col4` (`col3`,`col4`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 1 row in set (0.08 sec) insert into my_test1_0(id ) values( 1 ),(2),(3); update my_test1_0 set col5='jiji' where id=1;
查看
show engine innodb statusG
结果：
mysql> show engine innodb statusG *************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 2016-11-07 15:40:36 149c INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 0 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 3 srv_active, 0 srv_shutdown, 1528929 srv_idle srv_master_thread log flush and writes: 1528919 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 19 OS WAIT ARRAY INFO: signal count 18 Mutex spin waits 142, rounds 276, OS waits 7 RW-shared spins 9, rounds 221, OS waits 6 RW-excl spins 1, rounds 150, OS waits 5 Spin rounds per wait: 1.94 mutex, 24.56 RW-shared, 150.00 RW-excl ------------ TRANSACTIONS ------------ Trx id counter 22306 Purge done for trx's n:o < 22306 undo n:o < 0 state: running but idle History list length 446 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 11, OS thread handle 0x149c, query id 239 localhost ::1 root in t show engine innodb status -------- FILE I/O -------- I/O thread 0 state: wait Windows aio (insert buffer thread) I/O thread 1 state: wait Windows aio (log thread) I/O thread 2 state: wait Windows aio (read thread) I/O thread 3 state: wait Windows aio (read thread) I/O thread 4 state: wait Windows aio (read thread) I/O thread 5 state: wait Windows aio (read thread) I/O thread 6 state: wait Windows aio (write thread) I/O thread 7 state: wait Windows aio (write thread) I/O thread 8 state: wait Windows aio (write thread) I/O thread 9 state: wait Windows aio (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: 0 480 OS file reads, 55 OS file writes, 33 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 553253, node heap has 1 buffer(s) 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 2555311 Log flushed up to 2555311 Pages flushed up to 2555311 Last checkpoint at 2555311 0 pending log writes, 0 pending chkp writes 18 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 136052736; in additional pool allocated 0 Dictionary memory allocated 101103 Buffer pool size 8192 Free buffers 7737 Database pages 454 Old database pages 0 Modified db pages 0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 448, created 6, written 33 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/ LRU len: 454, 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 id 3908, state: sleeping Number of rows inserted 3, updated 1, deleted 0, read 1 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================ 1 row in set (0.08 sec) mysql>