存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
===================================== 2026-10-19 07:37:56 0x7ed8 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 17 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 7646 srv_active, 0 srv_shutdown, 48097 srv_idle srv_master_thread log flush and writes: 55743 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 6332 OS WAIT ARRAY INFO: signal count 6251 RW-shared spins 16274, rounds 276606, OS waits 4632 RW-excl spins 14, rounds 367, OS waits 12 RW-sx spins 0, rounds 0, OS waits 0 Spin rounds per wait: 17.00 RW-shared, 26.21 RW-excl, 0.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 2229983 Purge done for trx's n:o < 2229983 undo n:o < 0 state: running History list length 10 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283650826604760, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283650826600592, not started 0 lock struct(s), heap size 1128, 0 row lock(s) -------- FILE I/O -------- I/O thread 0 state: native aio handle (insert buffer thread) I/O thread 1 state: native aio handle (log thread) I/O thread 2 state: native aio handle (read thread) I/O thread 3 state: native aio handle (read thread) I/O thread 4 state: native aio handle (read thread) I/O thread 5 state: native aio handle (read thread) I/O thread 6 state: native aio handle (write thread) I/O thread 7 state: native aio handle (write thread) I/O thread 8 state: native aio handle (write thread) I/O thread 9 state: native aio handle (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 465897 OS file reads, 101079 OS file writes, 59045 OS fsyncs 0.41 reads/s, 16384 avg bytes/read, 3.65 writes/s, 3.24 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 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 0 buffer(s) Hash table size 4441, node heap has 0 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 1 buffer(s) 1.94 hash searches/s, 5.53 non-hash searches/s --- LOG --- Log sequence number 175728817 Log flushed up to 175728817 Pages flushed up to 175728817 Last checkpoint at 175728774 0 pending log flushes, 0 pending chkp writes 28126 log i/o's done, 2.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 132712 Buffer pool size 1003 Free buffers 741 Database pages 256 Old database pages 0 Modified db pages 0 Percent of dirty pages(LRU & free pages): 0.000 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 1299, not young 2188 0.00 youngs/s, 0.00 non-youngs/s Pages read 465841, created 727, written 61491 0.41 reads/s, 0.00 creates/s, 1.24 writes/s Buffer pool hit rate 970 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 256, unzip_LRU len: 0 I/O sum[106]: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=6304, Main thread ID=8004, state: sleeping Number of rows inserted 4, updated 13699, deleted 0, read 989120 0.00 inserts/s, 0.41 updates/s, 0.00 deletes/s, 2.00 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 35471 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================