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InnoDB

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

[ Aınymalylar | Býfer pýly | InnoDB mártebesi ]

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2025-11-07 16:02:33 0x7f98a0083700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 62 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 5696 srv_active, 0 srv_shutdown, 5937 srv_idle
srv_master_thread log flush and writes: 11632
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 18207
OS WAIT ARRAY INFO: signal count 16013
RW-shared spins 0, rounds 8355, OS waits 4142
RW-excl spins 0, rounds 1759, OS waits 60
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 8355.00 RW-shared, 1759.00 RW-excl, 0.00 RW-sx
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LATEST FOREIGN KEY ERROR
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2025-11-07 16:02:04 0x7f9891534700 Transaction:
TRANSACTION 62740, ACTIVE 0 sec inserting
mysql tables in use 1, locked 1
3 lock struct(s), heap size 1136, 1 row lock(s), undo log entries 1
MySQL thread id 114749, OS thread handle 140293249910528, query id 3975921 192.168.30.20 root Update
INSERT INTO operations_log (device_id, user_id, operation_type, operation_date, details)
VALUES (2, 5, 'صيانة', NOW(), 'تم إصلاح مشكلة في الجهاز')
Foreign key constraint fails for table `hospital_devices_db`.`operations_log`:
,
  CONSTRAINT `operations_log_ibfk_1` FOREIGN KEY (`device_id`) REFERENCES `devices` (`device_id`) in parent table, in index device_id tuple:
DATA TUPLE: 2 fields;
 0: len 4; hex 80000002; asc     ;;
 1: len 4; hex 80000002; asc     ;;

But in parent table `hospital_devices_db`.`devices`, in index PRIMARY,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 1; compact format; info bits 0
 0: len 8; hex 696e66696d756d00; asc infimum ;;

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TRANSACTIONS
------------
Trx id counter 62878
Purge done for trx's n:o < 62878 undo n:o < 0 state: running but idle
History list length 23
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421768248750584, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421768248746328, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421768248742072, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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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
864 OS file reads, 83526 OS file writes, 42115 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 11.56 writes/s, 5.63 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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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 9 buffer(s)
Hash table size 69257, node heap has 2 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 3 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
7.03 hash searches/s, 2.18 non-hash searches/s
---
LOG
---
Log sequence number 26063078
Log flushed up to   26062957
Pages flushed up to 26062584
Last checkpoint at  26045301
0 pending log flushes, 0 pending chkp writes
26395 log i/o's done, 3.29 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 152304
Buffer pool size   16024
Free buffers       15062
Database pages     896
Old database pages 330
Modified db pages  3
Percent of dirty pages(LRU & free pages): 0.019
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 705, created 191, written 51275
0.00 reads/s, 0.00 creates/s, 7.31 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: 896, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=902, Main thread ID=140292774631168, state: sleeping
Number of rows inserted 2, updated 12222, deleted 1, read 1837777
0.00 inserts/s, 1.77 updates/s, 0.00 deletes/s, 3.94 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 4454
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.03 reads/s
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END OF INNODB MONITOR OUTPUT
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