存储引擎
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
变量
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缓冲池
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InnoDB 状态
]
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2026-08-20 01:37:02 0x7f5b96f69640 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 2 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 4409 srv_active, 0 srv_shutdown, 50759 srv_idle
srv_master_thread log flush and writes: 55156
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 30199
OS WAIT ARRAY INFO: signal count 26300
RW-shared spins 9202, rounds 206979, OS waits 6168
RW-excl spins 342, rounds 734, OS waits 2
RW-sx spins 2, rounds 23, OS waits 0
Spin rounds per wait: 22.49 RW-shared, 2.15 RW-excl, 11.50 RW-sx
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TRANSACTIONS
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Trx id counter 2377688
Purge done for trx's n:o < 2377688 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421506279051528, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421506279047312, 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
132394 OS file reads, 58259 OS file writes, 37570 OS fsyncs
24.49 reads/s, 16384 avg bytes/read, 16.49 writes/s, 15.49 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 27, seg size 29, 3 merges
merged operations:
insert 4, 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 1 buffer(s)
42.98 hash searches/s, 125.44 non-hash searches/s
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LOG
---
Log sequence number 956963179
Log flushed up to 956962659
Pages flushed up to 956914793
Last checkpoint at 956896622
0 pending log flushes, 0 pending chkp writes
23639 log i/o's done, 11.50 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 712480
Buffer pool size 1003
Free buffers 713
Database pages 282
Old database pages 0
Modified db pages 86
Percent of dirty pages(LRU & free pages): 8.635
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1748, not young 915070
0.00 youngs/s, 0.00 non-youngs/s
Pages read 132098, created 586, written 29506
24.49 reads/s, 1.00 creates/s, 3.00 writes/s
Buffer pool hit rate 986 / 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: 282, unzip_LRU len: 0
I/O sum[654]: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=1288, Main thread ID=140030915860032, state: sleeping
Number of rows inserted 128, updated 7302, deleted 99, read 11223073
0.00 inserts/s, 10.49 updates/s, 0.00 deletes/s, 64.97 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 152633
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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