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Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2026-03-17 23:10:15 0x1c7c INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 65 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 46176 srv_active, 0 srv_shutdown, 3991780 srv_idle srv_master_thread log flush and writes: 4037956 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 4250726 OS WAIT ARRAY INFO: signal count 1047209 RW-shared spins 0, rounds 1582922, OS waits 306799 RW-excl spins 0, rounds 4245068, OS waits 74677 RW-sx spins 16232, rounds 219167, OS waits 5358 Spin rounds per wait: 1582922.00 RW-shared, 4245068.00 RW-excl, 13.50 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 196629256 Purge done for trx's n:o < 196629256 undo n:o < 0 state: running but idle History list length 0 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283438729564592, not started 0 lock struct(s), heap size 1136, 0 row lock(s) ---TRANSACTION 283438729560376, not started 0 lock struct(s), heap size 1136, 0 row lock(s) ---TRANSACTION 283438729556160, not started 0 lock struct(s), heap size 1136, 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 16490740 OS file reads, 5319744 OS file writes, 1834572 OS fsyncs 1.71 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 395, seg size 397, 743913 merges merged operations: insert 2186620, delete mark 1004710, delete 682158 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 0 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 113021911389 Log flushed up to 113021911389 Pages flushed up to 113021911389 Last checkpoint at 113021911380 0 pending log flushes, 0 pending chkp writes 1358570 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 1223424 Buffer pool size 1002 Free buffers 283 Database pages 712 Old database pages 282 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 836008, not young 538828882 0.06 youngs/s, 18.60 non-youngs/s Pages read 16490170, created 46903, written 3820750 1.71 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 923 / 1000, young-making rate 2 / 1000 not 833 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 712, unzip_LRU len: 0 I/O sum[59]: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=5488, Main thread ID=10808, state: sleeping Number of rows inserted 922066, updated 113455, deleted 251070, read 878041483 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 148.80 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 1360882 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================