Механизмы хранилища
InnoDB
Supports transactions, row-level locking, and foreign keys
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Переменные
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Буферный пул
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Состояние InnoDB
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2025-09-19 07:29:39 0x7f171007a700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 39 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 84 srv_active, 0 srv_shutdown, 746 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 147
OS WAIT ARRAY INFO: signal count 147
RW-shared spins 3, rounds 5, OS waits 2
RW-excl spins 2, rounds 60, OS waits 2
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.67 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 10182
Purge done for trx's n:o < 10180 undo n:o < 0 state: running but idle
History list length 16
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421212066335336, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421212066334464, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
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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
1652 OS file reads, 2034 OS file writes, 919 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.69 writes/s, 0.62 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 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 25 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 32 buffer(s)
1270.22 hash searches/s, 658.78 non-hash searches/s
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LOG
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Log sequence number 51100225
Log buffer assigned up to 51100225
Log buffer completed up to 51100225
Log written up to 51100225
Log flushed up to 51100225
Added dirty pages up to 51100225
Pages flushed up to 51100225
Last checkpoint at 51100225
578 log i/o's done, 0.23 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 137363456
Dictionary memory allocated 852209
Buffer pool size 8192
Free buffers 6508
Database pages 1609
Old database pages 573
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 517, not young 980484
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1447, created 177, written 1214
0.00 reads/s, 0.00 creates/s, 0.00 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: 1609, unzip_LRU len: 0
I/O sum[20]: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=364, Main thread ID=139736581617408 , state=sleeping
Number of rows inserted 435, updated 507, deleted 0, read 2104982
0.05 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1422.17 reads/s
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END OF INNODB MONITOR OUTPUT
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