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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2026-03-19 18:10:21 0x5c1c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 13 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 53040 srv_active, 0 srv_shutdown, 4025 srv_idle
srv_master_thread log flush and writes: 57065
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 3466887
OS WAIT ARRAY INFO: signal count 130502
RW-shared spins 12363, rounds 363800, OS waits 9982
RW-excl spins 646, rounds 17332, OS waits 479
RW-sx spins 9, rounds 230, OS waits 5
Spin rounds per wait: 29.43 RW-shared, 26.83 RW-excl, 25.56 RW-sx
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TRANSACTIONS
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Trx id counter 1865596
Purge done for trx's n:o < 1865596 undo n:o < 0 state: running
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283848590803232, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590828240, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590819904, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590807400, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590811568, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590799064, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590794896, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590815736, 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
115899 OS file reads, 666751 OS file writes, 369954 OS fsyncs
3.77 reads/s, 16384 avg bytes/read, 15.46 writes/s, 7.15 fsyncs/s
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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 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)
34.61 hash searches/s, 54.30 non-hash searches/s
---
LOG
---
Log sequence number 1094556184
Log flushed up to 1094556148
Pages flushed up to 1094540087
Last checkpoint at 1094537474
0 pending log flushes, 0 pending chkp writes
195302 log i/o's done, 3.85 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 120192
Buffer pool size 1003
Free buffers 734
Database pages 264
Old database pages 0
Modified db pages 43
Percent of dirty pages(LRU & free pages): 4.304
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 115831, created 4881, written 398199
3.77 reads/s, 0.08 creates/s, 10.15 writes/s
Buffer pool hit rate 982 / 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: 264, unzip_LRU len: 0
I/O sum[666]:cur[8], 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=17728, Main thread ID=5776, state: sleeping
Number of rows inserted 98, updated 117015, deleted 43, read 5268666
0.00 inserts/s, 2.54 updates/s, 0.00 deletes/s, 91.61 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 2453
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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