Supports transactions, row-level locking, foreign keys and encryption for tables
[ Variables | Buffer Pool | InnoDB Status ]
===================================== 2025-07-18 16:55:43 0xac4 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 24 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 233349 srv_active, 0 srv_shutdown, 4557745 srv_idle srv_master_thread log flush and writes: 4791094 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 12976665 OS WAIT ARRAY INFO: signal count 9285249 RW-shared spins 9151662, rounds 243421219, OS waits 7402797 RW-excl spins 5775592, rounds 11357645, OS waits 144269 RW-sx spins 119627, rounds 1314924, OS waits 25588 Spin rounds per wait: 26.60 RW-shared, 1.97 RW-excl, 10.99 RW-sx ------------------------ LATEST FOREIGN KEY ERROR ------------------------ 2025-07-14 14:56:01 0xd18 Transaction: TRANSACTION 30624628, ACTIVE 0 sec updating or deleting mysql tables in use 1, locked 1 4 lock struct(s), heap size 1128, 2 row lock(s), undo log entries 1 MySQL thread id 2170701, OS thread handle 3352, query id 44340784 localhost 127.0.0.1 root Updating DELETE FROM `sizes` WHERE `sizes`.`id` = 1 Foreign key constraint fails for table `freelumadigital`.`designs`: , CONSTRAINT `designs_ibfk_3` FOREIGN KEY (`size_id`) REFERENCES `sizes` (`id`) Trying to delete or update in parent table, in index PRIMARY tuple: DATA TUPLE: 5 fields; 0: len 4; hex 80000001; asc ;; 1: len 6; hex 000001d34b74; asc Kt;; 2: len 7; hex 3b000001b10aab; asc ; ;; 3: len 18; hex 537175617265202831303234783130323429; asc Square (1024x1024);; 4: len 9; hex 313032347831303234; asc 1024x1024;; But in child table `freelumadigital`.`designs`, in index size_id, there is a record: PHYSICAL RECORD: n_fields 2; compact format; info bits 0 0: len 4; hex 80000001; asc ;; 1: len 4; hex 800000cc; asc ;; ------------ TRANSACTIONS ------------ Trx id counter 30628789 Purge done for trx's n:o < 30628789 undo n:o < 0 state: running but idle History list length 0 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 283725376028888, not started 0 lock struct(s), heap size 1128, 0 row lock(s) ---TRANSACTION 283725376024720, 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 448176234 OS file reads, 10529173 OS file writes, 5833414 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 353, seg size 355, 79021 merges merged operations: insert 741648, delete mark 1325442, delete 92367 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) 0.17 hash searches/s, 0.17 non-hash searches/s --- LOG --- Log sequence number 3571164534 Log flushed up to 3571164534 Pages flushed up to 3571164534 Last checkpoint at 3571164525 0 pending log flushes, 0 pending chkp writes 4759115 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 33554432 Dictionary memory allocated 307992 Buffer pool size 1003 Free buffers 610 Database pages 385 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 680726340, not young 4055683736 0.00 youngs/s, 0.00 non-youngs/s Pages read 448176163, created 117901, written 5409049 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 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: 385, unzip_LRU len: 0 I/O sum[0]: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=7404, Main thread ID=7916, state: sleeping Number of rows inserted 3424815, updated 403619, deleted 1913778, read 104556910225 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.21 reads/s Number of system rows inserted 0, updated 0, deleted 0, read 286098 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================