Salvestusmootorid

InnoDB

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

[ Muutujad | Puhvertsoon | InnoDB staatus ]

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2025-11-27 06:48:14 0x7f14d88e6700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 15 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 9534 srv_active, 0 srv_shutdown, 14682 srv_idle
srv_master_thread log flush and writes: 24213
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 37373
OS WAIT ARRAY INFO: signal count 29098
RW-shared spins 0, rounds 15996, OS waits 7950
RW-excl spins 0, rounds 5063, OS waits 172
RW-sx spins 8, rounds 73, OS waits 1
Spin rounds per wait: 15996.00 RW-shared, 5063.00 RW-excl, 9.12 RW-sx
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LATEST FOREIGN KEY ERROR
------------------------
2025-11-27 01:27:49 0x7f14d8339700 Transaction:
TRANSACTION 42463, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
5 lock struct(s), heap size 1136, 2 row lock(s), undo log entries 1
MySQL thread id 12575, OS thread handle 139727503333120, query id 332386 192.168.30.20 root Update
INSERT INTO Prestamos (ID_Cliente, ID_Libro, FechaPrestamo, FechaDevolucion) VALUES
(1, 2, '2024-02-01', '2024-02-15'),
(2, 4, '2024-02-10', NULL),
(3, 1, '2024-02-05', '2024-02-20')
Foreign key constraint fails for table `Libreria`.`Prestamos`:
,
  CONSTRAINT `Prestamos_ibfk_2` FOREIGN KEY (`ID_Libro`) REFERENCES `Libros` (`ID`) in parent table, in index ID_Libro tuple:
DATA TUPLE: 2 fields;
 0: len 4; hex 80000002; asc     ;;
 1: len 4; hex 80000037; asc    7;;

But in parent table `Libreria`.`Libros`, in index PRIMARY,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 7; compact format; info bits 0
 0: len 4; hex 80000006; asc     ;;
 1: len 6; hex 000000000000; asc       ;;
 2: len 7; hex 80000000000000; asc        ;;
 3: len 21; hex 4369656e2061c3b16f7320646520736f6c65646164; asc Cien a  os de soledad;;
 4: len 24; hex 4761627269656c2047617263c3ad61204dc3a1727175657a; asc Gabriel Garc  a M  rquez;;
 5: len 16; hex 5265616c69736d6f206dc3a16769636f; asc Realismo m  gico;;
 6: len 4; hex 800007af; asc     ;;

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TRANSACTIONS
------------
Trx id counter 76572
Purge done for trx's n:o < 76572 undo n:o < 0 state: running but idle
History list length 22
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421202486010360, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421202486006104, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421202486001848, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
869 OS file reads, 136594 OS file writes, 76023 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 5.80 writes/s, 4.13 fsyncs/s
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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 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
4.73 hash searches/s, 0.73 non-hash searches/s
---
LOG
---
Log sequence number 34051108
Log flushed up to   34050971
Pages flushed up to 34048580
Last checkpoint at  34038361
0 pending log flushes, 0 pending chkp writes
44716 log i/o's done, 2.47 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 106880
Buffer pool size   16024
Free buffers       15118
Database pages     899
Old database pages 332
Modified db pages  5
Percent of dirty pages(LRU & free pages): 0.031
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 710, created 189, written 80379
0.00 reads/s, 0.00 creates/s, 2.73 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: 899, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=905, Main thread ID=139726736574208, state: sleeping
Number of rows inserted 31, updated 18874, deleted 5, read 595800
0.00 inserts/s, 1.20 updates/s, 0.00 deletes/s, 2.47 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 5503
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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