存储引擎

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ 变量 | 缓冲池 | InnoDB 状态 ]

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2025-08-11 21:39:23 0x5bc8 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: 580594 srv_active, 0 srv_shutdown, 7562408 srv_idle
srv_master_thread log flush and writes: 8142857
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 7328980
OS WAIT ARRAY INFO: signal count 2795550
RW-shared spins 1005540, rounds 29723314, OS waits 939393
RW-excl spins 320298, rounds 1796587, OS waits 18923
RW-sx spins 138, rounds 3507, OS waits 110
Spin rounds per wait: 29.56 RW-shared, 5.61 RW-excl, 25.41 RW-sx
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TRANSACTIONS
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Trx id counter 3661587
Purge done for trx's n:o < 3661587 undo n:o < 0 state: running but idle
History list length 12
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 281475165462744, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475165458576, 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: 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
18270775 OS file reads, 9546466 OS file writes, 5554018 OS fsyncs
1.38 reads/s, 16384 avg bytes/read, 9.19 writes/s, 5.05 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 390, seg size 392, 316867 merges
merged operations:
 insert 385842, 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 0 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 1 buffer(s)
5.86 hash searches/s, 13.38 non-hash searches/s
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LOG
---
Log sequence number 6268068261
Log flushed up to   6268068261
Pages flushed up to 6268068261
Last checkpoint at  6268052346
0 pending log flushes, 0 pending chkp writes
3412369 log i/o's done, 2.52 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 127704
Buffer pool size   1003
Free buffers       741
Database pages     256
Old database pages 0
Modified db pages  0
Percent of dirty pages(LRU & free pages): 0.000
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 982204, not young 23282687
0.00 youngs/s, 0.00 non-youngs/s
Pages read 18270721, created 20487, written 5368844
1.38 reads/s, 0.00 creates/s, 5.76 writes/s
Buffer pool hit rate 974 / 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: 256, unzip_LRU len: 0
I/O sum[390]:cur[0], 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=2132, Main thread ID=2572, state: sleeping
Number of rows inserted 703250, updated 668086, deleted 2, read 93827256
0.00 inserts/s, 1.19 updates/s, 0.00 deletes/s, 5.48 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1340
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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