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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2026-08-20 23:48:33 0x7f62dbc686c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 1 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 779 srv_active, 0 srv_shutdown, 48461 srv_idle
srv_master_thread log flush and writes: 49239
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 42825
OS WAIT ARRAY INFO: signal count 11531
RW-shared spins 1001, rounds 28571, OS waits 896
RW-excl spins 40, rounds 297, OS waits 7
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 28.54 RW-shared, 7.42 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 29786714
Purge done for trx's n:o < 29786714 undo n:o < 0 state: running but idle
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421537753284992, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421537753276560, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421537753280776, 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
54728 OS file reads, 18537 OS file writes, 8327 OS fsyncs
4.00 reads/s, 16384 avg bytes/read, 5.00 writes/s, 5.00 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 59, seg size 61, 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 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 0 buffer(s)
Hash table size 4441, node heap has 2 buffer(s)
45.95 hash searches/s, 75.92 non-hash searches/s
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LOG
---
Log sequence number 5599922959
Log flushed up to   5599922939
Pages flushed up to 5599917416
Last checkpoint at  5599917407
0 pending log flushes, 0 pending chkp writes
5128 log i/o's done, 5.00 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 502640
Buffer pool size   1003
Free buffers       735
Database pages     260
Old database pages 0
Modified db pages  11
Percent of dirty pages(LRU & free pages): 1.104
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 22473, not young 1559442
0.00 youngs/s, 0.00 non-youngs/s
Pages read 54519, created 320, written 12083
4.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 981 / 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[21]:cur[4], 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=5666, Main thread ID=140062119405248, state: sleeping
Number of rows inserted 0, updated 3592, deleted 0, read 14976589
0.00 inserts/s, 5.00 updates/s, 0.00 deletes/s, 40.96 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 12012
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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