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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2026-05-19 04:58:07 0x7fd6443dd700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 21 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 32705 srv_active, 0 srv_shutdown, 10122671 srv_idle
srv_master_thread log flush and writes: 10153129
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 35402
OS WAIT ARRAY INFO: signal count 35329
RW-shared spins 31025, rounds 926618, OS waits 30827
RW-excl spins 1195, rounds 34607, OS waits 1138
RW-sx spins 30, rounds 826, OS waits 27
Spin rounds per wait: 29.87 RW-shared, 28.96 RW-excl, 27.53 RW-sx
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TRANSACTIONS
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Trx id counter 277347
Purge done for trx's n:o < 277347 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422033268748672, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 422033268744456, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 422033268740240, 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: 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
109224 OS file reads, 400562 OS file writes, 256154 OS fsyncs
11.90 reads/s, 16384 avg bytes/read, 24.19 writes/s, 10.19 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 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 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
26.33 hash searches/s, 68.38 non-hash searches/s
---
LOG
---
Log sequence number 159991718
Log flushed up to 159991698
Pages flushed up to 159929373
Last checkpoint at 159922825
0 pending log flushes, 0 pending chkp writes
147832 log i/o's done, 6.57 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 90280
Buffer pool size 1003
Free buffers 682
Database pages 316
Old database pages 0
Modified db pages 56
Percent of dirty pages(LRU & free pages): 5.606
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 6, not young 102
0.00 youngs/s, 0.00 non-youngs/s
Pages read 109184, created 2186, written 210913
11.90 reads/s, 0.19 creates/s, 16.05 writes/s
Buffer pool hit rate 961 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 1.52/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 316, unzip_LRU len: 0
I/O sum[762]:cur[108], 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=2429, Main thread ID=140557426878208, state: sleeping
Number of rows inserted 1138, updated 51704, deleted 0, read 10414675
0.00 inserts/s, 5.29 updates/s, 0.00 deletes/s, 393.27 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 53516
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 2.48 reads/s
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END OF INNODB MONITOR OUTPUT
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