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 23:33:12 0x8d20 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 24 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 10885 srv_active, 0 srv_shutdown, 134523 srv_idle
srv_master_thread log flush and writes: 145408
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17122
OS WAIT ARRAY INFO: signal count 13183
RW-shared spins 6855, rounds 202035, OS waits 6602
RW-excl spins 747, rounds 9659, OS waits 180
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 29.47 RW-shared, 12.93 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 38243
Purge done for trx's n:o < 38243 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283119929090264, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283119929086096, 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
41438 OS file reads, 114814 OS file writes, 69520 OS fsyncs
5.83 reads/s, 16384 avg bytes/read, 19.04 writes/s, 6.42 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)
15.79 hash searches/s, 38.42 non-hash searches/s
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LOG
---
Log sequence number 20925717
Log flushed up to 20925717
Pages flushed up to 20925717
Last checkpoint at 20925674
0 pending log flushes, 0 pending chkp writes
34618 log i/o's done, 4.17 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 740
Database pages 258
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 1126, not young 3305
0.00 youngs/s, 0.00 non-youngs/s
Pages read 41375, created 606, written 68332
5.83 reads/s, 0.12 creates/s, 13.92 writes/s
Buffer pool hit rate 961 / 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: 258, unzip_LRU len: 0
I/O sum[752]: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=4936, Main thread ID=7084, state: sleeping
Number of rows inserted 111, updated 14346, deleted 31, read 647536
0.00 inserts/s, 2.92 updates/s, 0.00 deletes/s, 15.46 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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