Moteurs de stockage
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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Variables
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Mémoire tampon
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État InnoDB
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2025-09-08 19:55:59 0x45c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 14 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 410746 srv_active, 0 srv_shutdown, 29507 srv_idle
srv_master_thread log flush and writes: 440253
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 271348
OS WAIT ARRAY INFO: signal count 216219
RW-shared spins 108081, rounds 2480921, OS waits 80381
RW-excl spins 4498, rounds 109813, OS waits 3263
RW-sx spins 170, rounds 4229, OS waits 123
Spin rounds per wait: 22.95 RW-shared, 24.41 RW-excl, 24.88 RW-sx
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TRANSACTIONS
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Trx id counter 14415711
Purge done for trx's n:o < 14415711 undo n:o < 0 state: running
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284218235637976, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284218235633808, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
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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
1446045 OS file reads, 7122579 OS file writes, 3883317 OS fsyncs
6.29 reads/s, 16384 avg bytes/read, 19.07 writes/s, 10.28 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 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 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)
55.64 hash searches/s, 89.49 non-hash searches/s
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LOG
---
Log sequence number 9322140494
Log flushed up to 9322140474
Pages flushed up to 9322133908
Last checkpoint at 9322123819
0 pending log flushes, 0 pending chkp writes
2057250 log i/o's done, 5.21 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 33554432
Dictionary memory allocated 247896
Buffer pool size 1003
Free buffers 741
Database pages 256
Old database pages 0
Modified db pages 19
Percent of dirty pages(LRU & free pages): 1.904
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 18, not young 482
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1445938, created 60488, written 4280667
6.29 reads/s, 0.07 creates/s, 11.71 writes/s
Buffer pool hit rate 981 / 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: 256, unzip_LRU len: 0
I/O sum[855]:cur[5], 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=4648, Main thread ID=6648, state: sleeping
Number of rows inserted 339, updated 1424444, deleted 18, read 33417519
0.00 inserts/s, 3.71 updates/s, 0.00 deletes/s, 106.99 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 41171
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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