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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2026-05-18 16:30:30 0x71332791e6c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 6 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 6793 srv_active, 0 srv_shutdown, 88738 srv_idle
srv_master_thread log flush and writes: 95529
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 153924
OS WAIT ARRAY INFO: signal count 64669
RW-shared spins 1776, rounds 53100, OS waits 1764
RW-excl spins 133, rounds 2208, OS waits 63
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 29.90 RW-shared, 16.60 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 36647
Purge done for trx's n:o < 36647 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 405939449041160, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 405939449036944, 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: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
12233 OS file reads, 77302 OS file writes, 43251 OS fsyncs
4.17 reads/s, 16384 avg bytes/read, 17.00 writes/s, 7.50 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 0 buffer(s)
Hash table size 4441, node heap has 0 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
26.66 hash searches/s, 58.66 non-hash searches/s
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LOG
---
Log sequence number 13887132
Log flushed up to 13887132
Pages flushed up to 13887132
Last checkpoint at 13877918
0 pending log flushes, 0 pending chkp writes
21157 log i/o's done, 4.17 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 122000
Buffer pool size 1003
Free buffers 744
Database pages 256
Old database pages 0
Modified db pages 0
Percent of dirty pages(LRU & free pages): 0.000
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 12180, created 442, written 48408
4.17 reads/s, 0.00 creates/s, 11.66 writes/s
Buffer pool hit rate 979 / 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[298]:cur[4], 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=39233, Main thread ID=124463748196032, state: sleeping
Number of rows inserted 62, updated 10747, deleted 0, read 227237
0.00 inserts/s, 2.67 updates/s, 0.00 deletes/s, 21.33 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 18080
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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