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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2025-12-05 23:34:31 0x5d80 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 18 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 10914 srv_active, 0 srv_shutdown, 134572 srv_idle
srv_master_thread log flush and writes: 145486
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17434
OS WAIT ARRAY INFO: signal count 13288
RW-shared spins 6883, rounds 202847, OS waits 6628
RW-excl spins 749, rounds 9696, OS waits 181
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 29.47 RW-shared, 12.95 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 38545
Purge done for trx's n:o < 38545 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283119929086096, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283119929090264, 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
41679 OS file reads, 115520 OS file writes, 69848 OS fsyncs
3.50 reads/s, 16384 avg bytes/read, 10.67 writes/s, 5.00 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 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)
15.00 hash searches/s, 35.00 non-hash searches/s
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LOG
---
Log sequence number 21118277
Log flushed up to 21118257
Pages flushed up to 21102519
Last checkpoint at 21101368
0 pending log flushes, 0 pending chkp writes
34821 log i/o's done, 3.22 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 150240
Buffer pool size 1003
Free buffers 745
Database pages 253
Old database pages 0
Modified db pages 22
Percent of dirty pages(LRU & free pages): 2.202
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1126, not young 3305
0.00 youngs/s, 0.00 non-youngs/s
Pages read 41616, created 612, written 68781
3.50 reads/s, 0.11 creates/s, 6.61 writes/s
Buffer pool hit rate 974 / 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: 253, unzip_LRU len: 0
I/O sum[184]:cur[14], 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=4936, Main thread ID=7084, state: sleeping
Number of rows inserted 111, updated 14497, deleted 31, read 648472
0.00 inserts/s, 2.28 updates/s, 0.00 deletes/s, 21.72 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 33754
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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