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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2026-03-30 16:52:28 0x7f33e81d46c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 47 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 411144 srv_active, 0 srv_shutdown, 140075 srv_idle
srv_master_thread log flush and writes: 551146
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 10340394
OS WAIT ARRAY INFO: signal count 5542659
RW-shared spins 183718, rounds 5505920, OS waits 180660
RW-excl spins 633, rounds 18880, OS waits 593
RW-sx spins 2, rounds 60, OS waits 1
Spin rounds per wait: 29.97 RW-shared, 29.83 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 19143885
Purge done for trx's n:o < 19143885 undo n:o < 0 state: running but idle
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421336235942272, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421336235938056, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421336235933840, 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
232187 OS file reads, 4879526 OS file writes, 2899442 OS fsyncs
0.64 reads/s, 16384 avg bytes/read, 10.23 writes/s, 5.81 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 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)
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)
33.02 hash searches/s, 45.13 non-hash searches/s
---
LOG
---
Log sequence number 2932032846
Log flushed up to 2932032826
Pages flushed up to 2932031282
Last checkpoint at 2932009860
0 pending log flushes, 0 pending chkp writes
1462595 log i/o's done, 2.96 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 75640
Buffer pool size 1003
Free buffers 743
Database pages 257
Old database pages 0
Modified db pages 19
Percent of dirty pages(LRU & free pages): 1.898
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 232146, created 18721, written 2865154
0.64 reads/s, 0.09 creates/s, 6.21 writes/s
Buffer pool hit rate 996 / 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: 257, unzip_LRU len: 0
I/O sum[349]: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=292, Main thread ID=139860132210368, state: sleeping
Number of rows inserted 0, updated 699747, deleted 0, read 8328414
0.00 inserts/s, 1.55 updates/s, 0.00 deletes/s, 15.87 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 656
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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