存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
变量
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缓冲池
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InnoDB 状态
]
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2026-10-21 00:58:03 0x51fc INNODB MONITOR OUTPUT
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Per second averages calculated from the last 29 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 19276 srv_active, 0 srv_shutdown, 6614562 srv_idle
srv_master_thread log flush and writes: 6633837
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 152257
OS WAIT ARRAY INFO: signal count 34604
RW-shared spins 16256, rounds 456920, OS waits 11941
RW-excl spins 15, rounds 341, OS waits 9
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 28.11 RW-shared, 22.73 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 80097
Purge done for trx's n:o < 80097 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284258631610656, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284258631602320, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284258631606488, 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
39453 OS file reads, 229643 OS file writes, 141838 OS fsyncs
1.86 reads/s, 16384 avg bytes/read, 5.76 writes/s, 3.24 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
9.28 hash searches/s, 22.83 non-hash searches/s
---
LOG
---
Log sequence number 44235804
Log flushed up to 44235768
Pages flushed up to 44199921
Last checkpoint at 44198431
0 pending log flushes, 0 pending chkp writes
81863 log i/o's done, 2.48 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 80128
Buffer pool size 1003
Free buffers 734
Database pages 266
Old database pages 0
Modified db pages 68
Percent of dirty pages(LRU & free pages): 6.793
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 39415, created 1327, written 126277
1.86 reads/s, 0.17 creates/s, 2.93 writes/s
Buffer pool hit rate 980 / 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: 266, unzip_LRU len: 0
I/O sum[331]:cur[10], 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=18316, Main thread ID=21920, state: sleeping
Number of rows inserted 1, updated 29372, deleted 0, read 598878
0.00 inserts/s, 1.86 updates/s, 0.00 deletes/s, 9.45 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 28927
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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