Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2026-06-15 10:48:59 0x354 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 4 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 177 srv_active, 0 srv_shutdown, 76640 srv_idle srv_master_thread log flush and writes: 76817 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 958 OS WAIT ARRAY INFO: signal count 717 RW-shared spins 710, rounds 15629, OS waits 474 RW-excl spins 282, rounds 791, OS waits 12 RW-sx spins 1, rounds 30, OS waits 1 Spin rounds per wait: 22.01 RW-shared, 2.80 RW-excl, 30.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 6153795 Purge done for trx's n:o < 6153795 undo n:o < 0 state: running but idle History list length 9 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283705518616720, 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 132339 OS file reads, 3907 OS file writes, 1998 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 97, seg size 99, 37 merges merged operations: insert 34, delete mark 7, delete 4 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) 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 75631511248 Log flushed up to 75631511248 Pages flushed up to 75631511248 Last checkpoint at 75631511239 0 pending log flushes, 0 pending chkp writes 1217 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 2822008 Buffer pool size 1003 Free buffers 768 Database pages 227 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 2357, not young 481692 0.00 youngs/s, 0.00 non-youngs/s Pages read 131208, created 165, written 2444 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 227, unzip_LRU len: 0 I/O sum[569]: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=3708, Main thread ID=7616, state: sleeping Number of rows inserted 331, updated 186, deleted 12, read 44079047 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 0 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================