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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2025-12-26 05:46:36 0xa6b4 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 29 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 13356 srv_active, 0 srv_shutdown, 7910536 srv_idle
srv_master_thread log flush and writes: 7877517
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 14482
OS WAIT ARRAY INFO: signal count 14066
RW-shared spins 0, rounds 26720, OS waits 13354
RW-excl spins 0, rounds 721, OS waits 23
RW-sx spins 3, rounds 90, OS waits 3
Spin rounds per wait: 26720.00 RW-shared, 721.00 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 65396
Purge done for trx's n:o < 65396 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282973602505136, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282973602500920, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282973602496704, 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
33163 OS file reads, 174613 OS file writes, 107345 OS fsyncs
1.48 reads/s, 16384 avg bytes/read, 6.10 writes/s, 2.28 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
5.41 hash searches/s, 19.86 non-hash searches/s
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LOG
---
Log sequence number 42282563
Log flushed up to 42282543
Pages flushed up to 42272385
Last checkpoint at 42258245
0 pending log flushes, 0 pending chkp writes
64184 log i/o's done, 2.07 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 88128
Buffer pool size 1002
Free buffers 742
Database pages 258
Old database pages 0
Modified db pages 34
Percent of dirty pages(LRU & free pages): 3.397
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 33001, created 1192, written 94991
1.48 reads/s, 0.48 creates/s, 3.93 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: 258, unzip_LRU len: 0
I/O sum[156]:cur[1], 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=59476, Main thread ID=64504, state: sleeping
Number of rows inserted 1, updated 21808, deleted 0, read 160391
0.00 inserts/s, 1.59 updates/s, 0.00 deletes/s, 5.14 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 9789
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.76 reads/s
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END OF INNODB MONITOR OUTPUT
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