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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2025-08-23 00:55:46 0xc1c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 23 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 135 srv_active, 0 srv_shutdown, 916583 srv_idle
srv_master_thread log flush and writes: 916718
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 8718
OS WAIT ARRAY INFO: signal count 392
RW-shared spins 167, rounds 2399, OS waits 51
RW-excl spins 35, rounds 513, OS waits 10
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 14.37 RW-shared, 14.66 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 1208
Purge done for trx's n:o < 1208 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282995591729584, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282995591725416, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282995591721248, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282995591717080, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282995591712912, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
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
1179 OS file reads, 2763 OS file writes, 1091 OS fsyncs
3.09 reads/s, 16384 avg bytes/read, 2.35 writes/s, 2.35 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 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
8.26 hash searches/s, 21.74 non-hash searches/s
---
LOG
---
Log sequence number 961141
Log flushed up to 960485
Pages flushed up to 920214
Last checkpoint at 917762
0 pending log flushes, 0 pending chkp writes
733 log i/o's done, 1.74 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 80128
Buffer pool size 1003
Free buffers 741
Database pages 259
Old database pages 0
Modified db pages 81
Percent of dirty pages(LRU & free pages): 8.092
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 1143, created 196, written 1891
3.09 reads/s, 0.00 creates/s, 0.30 writes/s
Buffer pool hit rate 956 / 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: 259, unzip_LRU len: 0
I/O sum[315]:cur[4], 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=1776, Main thread ID=1508, state: sleeping
Number of rows inserted 1, updated 508, deleted 0, read 3200
0.00 inserts/s, 1.52 updates/s, 0.00 deletes/s, 8.22 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 395
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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