Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2025-07-03 03:35:46 0x3354 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 35 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 191133 srv_active, 0 srv_shutdown, 3272745 srv_idle
srv_master_thread log flush and writes: 3463878
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 12584446
OS WAIT ARRAY INFO: signal count 9030867
RW-shared spins 8959815, rounds 237990724, OS waits 7232407
RW-excl spins 5708044, rounds 11209876, OS waits 142642
RW-sx spins 119468, rounds 1309500, OS waits 25440
Spin rounds per wait: 26.56 RW-shared, 1.96 RW-excl, 10.96 RW-sx
------------------------
LATEST FOREIGN KEY ERROR
------------------------
2025-06-28 19:58:48 0x1b00 Transaction:
TRANSACTION 30415672, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
5 lock struct(s), heap size 1128, 2 row lock(s), undo log entries 1
MySQL thread id 1910815, OS thread handle 6912, query id 31587483 CLOUD-PJCQRPUIU 45.58.43.18 FreeLuma Update
INSERT INTO videos (
        category_id, channel_id, title, description, tags, status
    ) VALUES (?, ?, ?, ?, ?, 'draft')
Foreign key constraint fails for table `freelumatv`.`videos`:
,
  CONSTRAINT `videos_ibfk_2` FOREIGN KEY (`channel_id`) REFERENCES `channels` (`id`) in parent table, in index channel_id tuple:
DATA TUPLE: 2 fields;
 0: len 4; hex 80000000; asc     ;;
 1: len 4; hex 80000072; asc    r;;

But in parent table `freelumatv`.`channels`, in index PRIMARY,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 9; compact format; info bits 0
 0: len 4; hex 80000001; asc     ;;
 1: len 6; hex 000000000000; asc       ;;
 2: len 7; hex 80000000000000; asc        ;;
 3: len 13; hex 546865204372696d6520496e6b; asc The Crime Ink;;
 4: len 30; hex 796132392e613041533348364e796c74384c4b7a544236614e575a545934; asc ya29.a0AS3H6Nylt8LKzTB6aNWZTY4; (total 224 bytes);
 5: len 0; hex ; asc ;;
 6: len 5; hex 99b6f0fb16; asc      ;;
 7: len 24; hex 55434e794c3046415258687956776d743456547049476741; asc UCNyL0FARXhyVwmt4VTpIGgA;;
 8: len 4; hex 80000001; asc     ;;

------------
TRANSACTIONS
------------
Trx id counter 30530674
Purge done for trx's n:o < 30530674 undo n:o < 0 state: running but idle
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283725376033056, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---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
441917508 OS file reads, 9985189 OS file writes, 5446329 OS fsyncs
0.83 reads/s, 16384 avg bytes/read, 4.80 writes/s, 3.29 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 353, seg size 355, 78297 merges
merged operations:
 insert 740179, 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 0 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)
3.69 hash searches/s, 8.26 non-hash searches/s
---
LOG
---
Log sequence number 3506831825
Log flushed up to   3506831805
Pages flushed up to 3506830396
Last checkpoint at  3506822395
0 pending log flushes, 0 pending chkp writes
4510067 log i/o's done, 1.86 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 307992
Buffer pool size   1003
Free buffers       739
Database pages     257
Old database pages 0
Modified db pages  5
Percent of dirty pages(LRU & free pages): 0.502
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 676152555, not young 4009014013
0.00 youngs/s, 0.00 non-youngs/s
Pages read 441917437, created 115247, written 5161224
0.83 reads/s, 0.06 creates/s, 2.46 writes/s
Buffer pool hit rate 976 / 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: 257, unzip_LRU len: 0
I/O sum[112]:cur[3], 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 3420481, updated 360381, deleted 1912305, read 103531102337
0.00 inserts/s, 0.57 updates/s, 0.00 deletes/s, 3.57 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 197797
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
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