Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2025-11-11 00:21:31 0x23ec INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 47 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 53936 srv_active, 0 srv_shutdown, 220206 srv_idle srv_master_thread log flush and writes: 274142 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 1762873 OS WAIT ARRAY INFO: signal count 163459 RW-shared spins 36513, rounds 1086065, OS waits 34750 RW-excl spins 728, rounds 13438, OS waits 311 RW-sx spins 5, rounds 150, OS waits 3 Spin rounds per wait: 29.74 RW-shared, 18.46 RW-excl, 30.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 9417322 Purge done for trx's n:o < 9417320 undo n:o < 0 state: running History list length 33 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 284042686611672, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686636680, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686632512, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686628344, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686607504, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686620008, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686615840, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 284042686624176, 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 115619 OS file reads, 684391 OS file writes, 402631 OS fsyncs 0.23 reads/s, 16384 avg bytes/read, 0.28 writes/s, 0.21 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 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) 1.26 hash searches/s, 2.21 non-hash searches/s --- LOG --- Log sequence number 5133635306 Log flushed up to 5133635306 Pages flushed up to 5133628449 Last checkpoint at 5133625752 0 pending log flushes, 0 pending chkp writes 224697 log i/o's done, 0.15 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 415664 Buffer pool size 1003 Free buffers 731 Database pages 264 Old database pages 0 Modified db pages 13 Percent of dirty pages(LRU & free pages): 1.305 Max dirty pages percent: 75.000 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 71, not young 1863 0.00 youngs/s, 0.00 non-youngs/s Pages read 115457, created 5455, written 393836 0.23 reads/s, 0.02 creates/s, 0.11 writes/s Buffer pool hit rate 962 / 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: 264, unzip_LRU len: 0 I/O sum[0]:cur[16], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Process ID=16204, Main thread ID=14112, state: sleeping Number of rows inserted 329, updated 98225, deleted 145, read 1590874 0.00 inserts/s, 0.15 updates/s, 0.00 deletes/s, 1.32 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 131279 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================