存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
===================================== 2026-10-02 12:07:42 0x6cb0 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 49 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 135 srv_active, 0 srv_shutdown, 171985 srv_idle srv_master_thread log flush and writes: 172120 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 351 OS WAIT ARRAY INFO: signal count 349 RW-shared spins 497, rounds 10828, OS waits 282 RW-excl spins 24, rounds 124, OS waits 2 RW-sx spins 2, rounds 31, OS waits 1 Spin rounds per wait: 21.79 RW-shared, 5.17 RW-excl, 15.50 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 1627270 Purge done for trx's n:o < 1607332 undo n:o < 0 state: running but idle History list length 0 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283428874092760, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283428874088592, 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 13435 OS file reads, 2190 OS file writes, 1514 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 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 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 0 buffer(s) Hash table size 4441, node heap has 1 buffer(s) 0.10 hash searches/s, 0.06 non-hash searches/s --- LOG --- Log sequence number 158648348 Log flushed up to 158648348 Pages flushed up to 158648348 Last checkpoint at 158648339 0 pending log flushes, 0 pending chkp writes 908 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 132712 Buffer pool size 1003 Free buffers 614 Database pages 386 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 218, not young 6 0.00 youngs/s, 0.00 non-youngs/s Pages read 13379, created 144, written 1032 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: 386, 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=6436, Main thread ID=8128, state: sleeping Number of rows inserted 2, updated 170, deleted 0, read 2795015 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.10 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 295 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================