Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2026-07-05 01:42:29 0xe10 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 3 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 39 srv_active, 0 srv_shutdown, 31977 srv_idle srv_master_thread log flush and writes: 32016 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 2721 OS WAIT ARRAY INFO: signal count 499 RW-shared spins 260, rounds 6647, OS waits 169 RW-excl spins 206, rounds 2070, OS waits 43 RW-sx spins 0, rounds 0, OS waits 0 Spin rounds per wait: 25.57 RW-shared, 10.05 RW-excl, 0.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 30350 Purge done for trx's n:o < 30350 undo n:o < 0 state: running but idle History list length 0 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283624021463184, 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 9206 OS file reads, 3053 OS file writes, 1069 OS fsyncs 1.33 reads/s, 16384 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 30, seg size 32, 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 2 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 2 buffer(s) Hash table size 4441, node heap has 2 buffer(s) Hash table size 4441, node heap has 1 buffer(s) 26.66 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 23703991 Log flushed up to 23703991 Pages flushed up to 23703991 Last checkpoint at 23703982 0 pending log flushes, 0 pending chkp writes 872 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 1006608 Buffer pool size 1003 Free buffers 90 Database pages 902 Old database pages 322 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 3720, not young 50351 0.00 youngs/s, 2.00 non-youngs/s Pages read 8802, created 180, written 2099 1.33 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 975 / 1000, young-making rate 0 / 1000 not 36 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 902, unzip_LRU len: 0 I/O sum[13]: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=828, Main thread ID=18224, state: sleeping Number of rows inserted 744, updated 1, deleted 0, read 1062733 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 106664 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================