存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
===================================== 2026-07-29 04:32:45 0x6d8c INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 40 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 4726 srv_active, 0 srv_shutdown, 716694 srv_idle srv_master_thread log flush and writes: 721420 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 153885 OS WAIT ARRAY INFO: signal count 119352 RW-shared spins 151682, rounds 3824848, OS waits 113398 RW-excl spins 17753, rounds 39679, OS waits 377 RW-sx spins 967, rounds 12109, OS waits 247 Spin rounds per wait: 25.22 RW-shared, 2.24 RW-excl, 12.52 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 30722036 Purge done for trx's n:o < 30722036 undo n:o < 0 state: running but idle History list length 4 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283265498890528, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283265498886360, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283265498882192, 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 856909 OS file reads, 79127 OS file writes, 45422 OS fsyncs 0.17 reads/s, 16384 avg bytes/read, 1.70 writes/s, 1.17 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 1183 merges merged operations: insert 2636, delete mark 47, delete 26 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 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) 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) 3.17 hash searches/s, 9.72 non-hash searches/s --- LOG --- Log sequence number 23119573055 Log flushed up to 23119573035 Pages flushed up to 23119571846 Last checkpoint at 23119571837 0 pending log flushes, 0 pending chkp writes 26400 log i/o's done, 0.70 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 125200 Buffer pool size 1003 Free buffers 739 Database pages 257 Old database pages 0 Modified db pages 3 Percent of dirty pages(LRU & free pages): 0.301 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 7685, not young 26701997 0.00 youngs/s, 0.00 non-youngs/s Pages read 856856, created 457, written 46738 0.17 reads/s, 0.02 creates/s, 0.82 writes/s Buffer pool hit rate 993 / 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: 257, unzip_LRU len: 0 I/O sum[39]:cur[1], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=26560, Main thread ID=26400, state: sleeping Number of rows inserted 6677, updated 14444, deleted 4087, read 83673985 0.00 inserts/s, 0.20 updates/s, 0.00 deletes/s, 4.80 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 4709 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================