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| show engine innodb status;
展示的主要内容有
BACKGROUND THREAD
srv_master_thread loops: 19610306 srv_active, 0 srv_shutdown, 9705136 srv_idle srv_master_thread log flush and writes: 29312902
SEMAPHORES
OS WAIT ARRAY INFO: reservation count 52795642 OS WAIT ARRAY INFO: signal count 57522728 RW-shared spins 0, rounds 77349143, OS waits 9180114 RW-excl spins 0, rounds 179767865, OS waits 2534243 RW-sx spins 2068750, rounds 40171680, OS waits 844522 Spin rounds per wait: 77349143.00 RW-shared, 179767865.00 RW-excl, 19.42 RW-sx
TRANSACTIONS
Trx id counter 1888483436 Purge done for trx s n:o < 1888483436 undo n:o < 0 state: running but idle History list length 17 LIST OF TRANSACTIONS FOR EACH SESSION: 当前事务列表
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
0 lock struct(s), heap size 1136, 0 row lock(s)
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) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] , ibuf aio reads:, log i/o's:, sync i/o's: Pending flushes (fsync) log: 0; buffer pool: 0 83934578288 OS file reads, 282688772 OS file writes, 190348192 OS fsyncs 984.40 reads/s, 16384 avg bytes/read, 10.15 writes/s, 9.12 fsyncs/s
INSERT BUFFER AND ADAPTIVE HASH INDEX
Ibuf: size 1, free list len 3078, seg size 3080, 8815726 merges merged operations: insert 6898371, delete mark 38430046, delete 1226485 discarded operations: insert 1019, delete mark 0, delete 0 Hash table size 34673, node heap has 1 buffer(s) Hash table size 34673, node heap has 74 buffer(s) Hash table size 34673, node heap has 1 buffer(s) Hash table size 34673, node heap has 1 buffer(s) Hash table size 34673, node heap has 1 buffer(s) Hash table size 34673, node heap has 2 buffer(s) Hash table size 34673, node heap has 28 buffer(s) Hash table size 34673, node heap has 7 buffer(s) 5203.54 hash searches/s, 128.14 non-hash searches/s
LOG
Log sequence number 319041331834 Log flushed up to 319041331699 Pages flushed up to 319033170877 Last checkpoint at 319033170877 0 pending log flushes, 0 pending chkp writes 169033177 log i/o's done, 8.92 log i/o's/second
BUFFER POOL AND MEMORY
Total large memory allocated 137428992 Dictionary memory allocated 1204989 Buffer pool size 8191 Free buffers 1024 Database pages 7052 Old database pages 2583 Modified db pages 530 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 983912385, not young 304833753259 1.54 youngs/s, 16246.04 non-youngs/s Pages read 83934649301, created 4135172, written 103030852 984.40 reads/s, 0.17 creates/s, 1.15 writes/s Buffer pool hit rate 972 / 1000, young-making rate 0 / 1000 not 478 / 1000 Pages read ahead 913.79/s, evicted without access 5.60/s, Random read ahead 0.00/s LRU len: 7052, unzip_LRU len: 0 I/O sum[4121]:cur[0], unzip sum[0]:cur[0]
ROW OPERATIONS
0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=1543, Main thread ID=140593683990272, state: sleeping Number of rows inserted 56092883, updated 133093048, deleted 40729879, read 477150639699 0.19 inserts/s, 7.73 updates/s, 0.00 deletes/s, 138100.85 reads/s
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