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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2026-04-02 17:02:16 0x7a16fcdff6c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 52 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 39772 srv_active, 0 srv_shutdown, 6723360 srv_idle
srv_master_thread log flush and writes: 6762486
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 106377
OS WAIT ARRAY INFO: signal count 53860
RW-shared spins 9817, rounds 289379, OS waits 9597
RW-excl spins 2070, rounds 29111, OS waits 737
RW-sx spins 10, rounds 273, OS waits 9
Spin rounds per wait: 29.48 RW-shared, 14.06 RW-excl, 27.30 RW-sx
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TRANSACTIONS
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Trx id counter 19133694
Purge done for trx's n:o < 19133694 undo n:o < 0 state: running but idle
History list length 9
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 415714071220376, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 415714071224600, 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: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
253146 OS file reads, 426081 OS file writes, 245648 OS fsyncs
11.65 reads/s, 16384 avg bytes/read, 3.15 writes/s, 1.67 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 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)
Hash table size 4441, node heap has 2 buffer(s)
42.81 hash searches/s, 40.69 non-hash searches/s
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LOG
---
Log sequence number 629819938
Log flushed up to 629819918
Pages flushed up to 629818766
Last checkpoint at 629816124
0 pending log flushes, 0 pending chkp writes
117657 log i/o's done, 0.87 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 33554432
Dictionary memory allocated 1363960
Buffer pool size 1003
Free buffers 737
Database pages 257
Old database pages 0
Modified db pages 3
Percent of dirty pages(LRU & free pages): 0.302
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 597, not young 28231
2.79 youngs/s, 39.31 non-youngs/s
Pages read 252583, created 3010, written 263266
11.65 reads/s, 0.02 creates/s, 1.96 writes/s
Buffer pool hit rate 957 / 1000, young-making rate 10 / 1000 not 144 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 257, unzip_LRU len: 0
I/O sum[700]: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=1194, Main thread ID=134237894194880, state: sleeping
Number of rows inserted 761, updated 58121, deleted 761, read 3611549
0.00 inserts/s, 0.56 updates/s, 0.00 deletes/s, 198.71 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 841993
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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