Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2026-06-06 18:07:35 0x24cc INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 35 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 6243598 srv_active, 0 srv_shutdown, 1890392 srv_idle srv_master_thread log flush and writes: 8105531 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 8830106 OS WAIT ARRAY INFO: signal count 3840382 RW-shared spins 3814209, rounds 36516083, OS waits 1058894 RW-excl spins 2252018, rounds 7283232, OS waits 56420 RW-sx spins 115536, rounds 1122706, OS waits 18085 Spin rounds per wait: 9.57 RW-shared, 3.23 RW-excl, 9.72 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 26899548 Purge done for trx's n:o < 26899548 undo n:o < 0 state: running History list length 2 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283400122880936, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122926784, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122922616, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122914280, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122901776, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122905944, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122876768, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122839256, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122843424, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122885104, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122855928, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122893440, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122872600, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122864264, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122868432, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122897608, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122860096, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122851760, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122847592, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122835088, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283400122889272, 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 1584107 OS file reads, 53757668 OS file writes, 28169051 OS fsyncs 2.97 reads/s, 16384 avg bytes/read, 6.83 writes/s, 2.69 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 11, seg size 13, 2956 merges merged operations: insert 78914, delete mark 77314, delete 64921 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) 9.09 hash searches/s, 17.66 non-hash searches/s --- LOG --- Log sequence number 167493182397 Log flushed up to 167493182377 Pages flushed up to 167493179560 Last checkpoint at 167493179551 0 pending log flushes, 0 pending chkp writes 9063722 log i/o's done, 1.71 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 185296 Buffer pool size 1003 Free buffers 734 Database pages 261 Old database pages 0 Modified db pages 27 Percent of dirty pages(LRU & free pages): 2.711 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 1584026, created 443937, written 36568988 2.97 reads/s, 0.06 creates/s, 4.63 writes/s Buffer pool hit rate 960 / 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: 261, unzip_LRU len: 0 I/O sum[358]:cur[5], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=8208, Main thread ID=4436, state: sleeping Number of rows inserted 7059, updated 39844644, deleted 9401, read 2993808979 0.00 inserts/s, 1.20 updates/s, 0.00 deletes/s, 17.43 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 179488 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================