存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
===================================== 2026-10-19 07:56:53 0x32a0 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 26 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 662 srv_active, 0 srv_shutdown, 6236 srv_idle srv_master_thread log flush and writes: 6898 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 30724 OS WAIT ARRAY INFO: signal count 16239 RW-shared spins 21765, rounds 131653, OS waits 2802 RW-excl spins 44824, rounds 151372, OS waits 568 RW-sx spins 4056, rounds 28260, OS waits 250 Spin rounds per wait: 6.05 RW-shared, 3.38 RW-excl, 6.97 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 65485529 Purge done for trx's n:o < 65485528 undo n:o < 0 state: running but idle History list length 4 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 282940197937368, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 282940197933200, 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 144919 OS file reads, 35739 OS file writes, 13112 OS fsyncs 8.38 reads/s, 16384 avg bytes/read, 1.04 writes/s, 0.81 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 390, seg size 392, 184 merges merged operations: insert 198, delete mark 100, delete 58 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 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) 8.27 hash searches/s, 13.88 non-hash searches/s --- LOG --- Log sequence number 11963537971 Log flushed up to 11963537971 Pages flushed up to 11963537971 Last checkpoint at 11963537962 0 pending log flushes, 0 pending chkp writes 8954 log i/o's done, 0.42 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 565904 Buffer pool size 1003 Free buffers 580 Database pages 415 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 5628, not young 2913283 0.12 youngs/s, 21.65 non-youngs/s Pages read 144690, created 1290, written 25365 8.38 reads/s, 0.00 creates/s, 0.50 writes/s Buffer pool hit rate 988 / 1000, young-making rate 0 / 1000 not 30 / 1000 Pages read ahead 0.65/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 415, unzip_LRU len: 0 I/O sum[1246]:cur[6], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=4252, Main thread ID=5336, state: sleeping Number of rows inserted 1275, updated 157414, deleted 132, read 29279669 0.00 inserts/s, 0.08 updates/s, 0.00 deletes/s, 5249.57 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 0 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================