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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2026-08-22 18:03:52 0x7f871c1ce700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 32 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 3538 srv_active, 0 srv_shutdown, 1524940 srv_idle
srv_master_thread log flush and writes: 1528076
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 2700
OS WAIT ARRAY INFO: signal count 2691
RW-shared spins 2007, rounds 59981, OS waits 1988
RW-excl spins 190, rounds 5598, OS waits 186
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.89 RW-shared, 29.46 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 300909
Purge done for trx's n:o < 300909 undo n:o < 0 state: running but idle
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421693473079560, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421693473075344, 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
15782 OS file reads, 44404 OS file writes, 26286 OS fsyncs
1.78 reads/s, 16384 avg bytes/read, 15.19 writes/s, 6.91 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 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)
23.37 hash searches/s, 50.47 non-hash searches/s
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LOG
---
Log sequence number 170628864
Log flushed up to   170628844
Pages flushed up to 170609187
Last checkpoint at  170521358
0 pending log flushes, 0 pending chkp writes
14295 log i/o's done, 5.06 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 90280
Buffer pool size   1002
Free buffers       738
Database pages     260
Old database pages 0
Modified db pages  48
Percent of dirty pages(LRU & free pages): 4.805
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 15741, created 409, written 25270
1.78 reads/s, 0.16 creates/s, 9.22 writes/s
Buffer pool hit rate 991 / 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: 260, unzip_LRU len: 0
I/O sum[550]: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=8924, Main thread ID=140217302370048, state: sleeping
Number of rows inserted 230, updated 6454, deleted 0, read 65272495
0.00 inserts/s, 4.25 updates/s, 0.00 deletes/s, 19.34 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 10951
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1.62 reads/s
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END OF INNODB MONITOR OUTPUT
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