Mecanismos de armazenamento
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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Variáveis
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Pool de buffer
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Status do InnoDB
]
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2026-10-31 09:50:14 0x11e8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 29 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 11799 srv_active, 0 srv_shutdown, 115075 srv_idle
srv_master_thread log flush and writes: 126874
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 208539
OS WAIT ARRAY INFO: signal count 38696
RW-shared spins 17586, rounds 526251, OS waits 17297
RW-excl spins 88, rounds 1801, OS waits 54
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.92 RW-shared, 20.47 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 204450
Purge done for trx's n:o < 204450 undo n:o < 0 state: running but idle
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283463084315272, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084311104, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084306936, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084294432, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084290264, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084302768, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084298600, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283463084286096, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
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
31390 OS file reads, 161276 OS file writes, 113743 OS fsyncs
0.62 reads/s, 16384 avg bytes/read, 3.03 writes/s, 1.90 fsyncs/s
-------------------------------------
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 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)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 2 buffer(s)
63.89 hash searches/s, 36.83 non-hash searches/s
---
LOG
---
Log sequence number 130412558
Log flushed up to 130412522
Pages flushed up to 130411512
Last checkpoint at 130403972
0 pending log flushes, 0 pending chkp writes
67826 log i/o's done, 1.03 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 302984
Buffer pool size 1003
Free buffers 738
Database pages 257
Old database pages 0
Modified db pages 3
Percent of dirty pages(LRU & free pages): 0.301
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 31266, created 675, written 76115
0.62 reads/s, 0.00 creates/s, 1.69 writes/s
Buffer pool hit rate 997 / 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: 257, unzip_LRU len: 0
I/O sum[111]:cur[1], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4692, Main thread ID=5296, state: sleeping
Number of rows inserted 7, updated 16176, deleted 1, read 83428842
0.00 inserts/s, 0.41 updates/s, 0.00 deletes/s, 672.87 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 20820
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
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