Speicher-Engines

InnoDB

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

[ Variablen | Puffer-Pool | InnoDB-Status ]

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2026-01-01 22:24:15 0x7fd1400b4700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 39 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 9876 srv_active, 0 srv_shutdown, 23671 srv_idle
srv_master_thread log flush and writes: 33544
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 27525
OS WAIT ARRAY INFO: signal count 25690
RW-shared spins 0, rounds 20261, OS waits 10092
RW-excl spins 0, rounds 1964, OS waits 66
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 20261.00 RW-shared, 1964.00 RW-excl, 30.00 RW-sx
------------------------
LATEST FOREIGN KEY ERROR
------------------------
2026-01-01 15:29:39 0x7fd13454a700 Error in foreign key constraint of table `mysql`.`sons`:
Create  table `mysql`.`sons` with foreign key constraint failed. Referenced table `mysql`.`utilisateurs` not found in the data dictionary near 'FOREIGN KEY (id_utilisateur) REFERENCES utilisateurs(id)
)'.
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TRANSACTIONS
------------
Trx id counter 73609
Purge done for trx's n:o < 73609 undo n:o < 0 state: running but idle
History list length 14
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422011676103320, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422011676099064, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422011676094808, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422011676090552, 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
863 OS file reads, 132577 OS file writes, 71441 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 5.08 writes/s, 2.92 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 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)
2.87 hash searches/s, 0.23 non-hash searches/s
---
LOG
---
Log sequence number 33862575
Log flushed up to   33862460
Pages flushed up to 33860088
Last checkpoint at  33860079
0 pending log flushes, 0 pending chkp writes
47549 log i/o's done, 2.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 152304
Buffer pool size   16024
Free buffers       15006
Database pages     952
Old database pages 346
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 704, created 248, written 76953
0.00 reads/s, 0.00 creates/s, 2.77 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: 952, 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=140535935256320, state: sleeping
Number of rows inserted 10, updated 17440, deleted 0, read 1350077
0.00 inserts/s, 0.72 updates/s, 0.00 deletes/s, 1.46 reads/s
Number of system rows inserted 377, updated 0, deleted 0, read 6747
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 9.67 reads/s
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END OF INNODB MONITOR OUTPUT
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