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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2025-04-12 09:13:23 0x71ee80f696c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 44 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 135 srv_active, 0 srv_shutdown, 9412897 srv_idle
srv_master_thread log flush and writes: 9412175
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 2774
OS WAIT ARRAY INFO: signal count 1639
RW-shared spins 88, rounds 2565, OS waits 85
RW-excl spins 1, rounds 30, OS waits 1
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.15 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 45428
Purge done for trx's n:o < 45428 undo n:o < 0 state: running
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 406744075346200, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 406744075341976, 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
5838 OS file reads, 1922 OS file writes, 842 OS fsyncs
0.05 reads/s, 16384 avg bytes/read, 0.00 writes/s, 0.00 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 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 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)
0.00 hash searches/s, 0.05 non-hash searches/s
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LOG
---
Log sequence number 21845275
Log flushed up to   21845275
Pages flushed up to 21845275
Last checkpoint at  21845266
0 pending log flushes, 0 pending chkp writes
556 log i/o's done, 0.00 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 1361520
Buffer pool size   1003
Free buffers       739
Database pages     258
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 54, not young 6590
0.00 youngs/s, 0.00 non-youngs/s
Pages read 5274, created 148, written 1266
0.05 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 333 / 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: 258, unzip_LRU len: 0
I/O sum[0]:cur[2], 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=1197, Main thread ID=125268335265472, state: sleeping
Number of rows inserted 0, updated 305, deleted 0, read 51948
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.05 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 23375
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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