存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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变量
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缓冲池
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InnoDB 状态
]
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2026-06-28 21:33:04 0x1b94 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 3 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 9133 srv_active, 0 srv_shutdown, 788042 srv_idle
srv_master_thread log flush and writes: 797175
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 164962
OS WAIT ARRAY INFO: signal count 40144
RW-shared spins 8778, rounds 249410, OS waits 7629
RW-excl spins 606, rounds 10093, OS waits 275
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 28.41 RW-shared, 16.66 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 58696
Purge done for trx's n:o < 58696 undo n:o < 0 state: running but idle
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283269806756056, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283269806751888, 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
113784 OS file reads, 112901 OS file writes, 63477 OS fsyncs
1.67 reads/s, 16384 avg bytes/read, 7.00 writes/s, 4.33 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, 285 merges
merged operations:
insert 277, delete mark 15, delete 7
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 2 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 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
6.33 hash searches/s, 12.66 non-hash searches/s
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LOG
---
Log sequence number 42731220
Log flushed up to 42731220
Pages flushed up to 42731220
Last checkpoint at 42728465
0 pending log flushes, 0 pending chkp writes
33079 log i/o's done, 2.33 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 140224
Buffer pool size 1003
Free buffers 738
Database pages 256
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 945, not young 17775
0.00 youngs/s, 0.00 non-youngs/s
Pages read 113727, created 728, written 69171
1.67 reads/s, 0.33 creates/s, 4.00 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: 256, unzip_LRU len: 0
I/O sum[621]:cur[6], 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=1356, Main thread ID=8752, state: sleeping
Number of rows inserted 191, updated 14649, deleted 0, read 21194585
0.00 inserts/s, 1.00 updates/s, 0.00 deletes/s, 5.00 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 39082
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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