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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2026-03-18 09:29:02 0x2d7c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 27 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 35507 srv_active, 0 srv_shutdown, 314876 srv_idle
srv_master_thread log flush and writes: 350383
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 59250
OS WAIT ARRAY INFO: signal count 58473
RW-shared spins 33463, rounds 992162, OS waits 33003
RW-excl spins 151, rounds 3506, OS waits 112
RW-sx spins 10, rounds 317, OS waits 9
Spin rounds per wait: 29.65 RW-shared, 23.22 RW-excl, 31.70 RW-sx
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TRANSACTIONS
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Trx id counter 42808577
Purge done for trx's n:o < 42808577 undo n:o < 0 state: running but idle
History list length 2
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284289389007064, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284289389002896, 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
132847 OS file reads, 476495 OS file writes, 292908 OS fsyncs
16.67 reads/s, 16384 avg bytes/read, 17.30 writes/s, 9.59 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)
25.18 hash searches/s, 83.18 non-hash searches/s
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LOG
---
Log sequence number 27250235761
Log flushed up to 27250235761
Pages flushed up to 27250150951
Last checkpoint at 27250143137
0 pending log flushes, 0 pending chkp writes
168486 log i/o's done, 6.70 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 151
Percent of dirty pages(LRU & free pages): 15.130
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 2765, not young 58437
0.00 youngs/s, 0.00 non-youngs/s
Pages read 132744, created 3308, written 261209
16.67 reads/s, 0.15 creates/s, 9.30 writes/s
Buffer pool hit rate 951 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 2.37/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 256, unzip_LRU len: 0
I/O sum[915]:cur[9], 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=6040, Main thread ID=6624, state: sleeping
Number of rows inserted 262, updated 58892, deleted 14, read 22935376
0.00 inserts/s, 5.22 updates/s, 0.00 deletes/s, 311.43 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 7483
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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