存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
===================================== 2026-06-30 00:18:39 0xa4ec INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 16 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 11030 srv_active, 0 srv_shutdown, 77359 srv_idle srv_master_thread log flush and writes: 88383 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 51545 OS WAIT ARRAY INFO: signal count 19674 RW-shared spins 5340, rounds 156403, OS waits 5170 RW-excl spins 603, rounds 4276, OS waits 70 RW-sx spins 2, rounds 48, OS waits 0 Spin rounds per wait: 29.29 RW-shared, 7.09 RW-excl, 24.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 36165 Purge done for trx's n:o < 36165 undo n:o < 0 state: running but idle History list length 0 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 284317571510488, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284317571506320, 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 50519 OS file reads, 125609 OS file writes, 74587 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 62, seg size 64, 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 25 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 8 buffer(s) Hash table size 4441, node heap has 1 buffer(s) Hash table size 4441, node heap has 25 buffer(s) Hash table size 4441, node heap has 1 buffer(s) 0.31 hash searches/s, 0.19 non-hash searches/s --- LOG --- Log sequence number 87771482 Log flushed up to 87771482 Pages flushed up to 87771482 Last checkpoint at 87771473 0 pending log flushes, 0 pending chkp writes 38196 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 162760 Buffer pool size 1003 Free buffers 685 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 418, not young 12288 0.00 youngs/s, 0.00 non-youngs/s Pages read 50454, created 897, written 74497 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 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[0]: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=29332, Main thread ID=23156, state: sleeping Number of rows inserted 233, updated 16460, deleted 113, read 18255405 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.31 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 25359 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================