Storage engines

InnoDB

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

[ Biến | Bể bộ đệm | Trạng thái InnoDB ]

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2025-12-12 08:12:36 0x114c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 54 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 33436 srv_active, 0 srv_shutdown, 6836594 srv_idle
srv_master_thread log flush and writes: 6870030
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 1744488
OS WAIT ARRAY INFO: signal count 367186
RW-shared spins 144746, rounds 3781044, OS waits 119444
RW-excl spins 85657, rounds 286040, OS waits 3423
RW-sx spins 19095, rounds 162819, OS waits 554
Spin rounds per wait: 26.12 RW-shared, 3.34 RW-excl, 8.53 RW-sx
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TRANSACTIONS
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Trx id counter 1334608
Purge done for trx's n:o < 1334608 undo n:o < 0 state: running
History list length 18
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 281680506184040, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281680506179872, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281680506175704, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281680506171536, 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: 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
212917 OS file reads, 1161850 OS file writes, 469080 OS fsyncs
2.76 reads/s, 16384 avg bytes/read, 3.93 writes/s, 2.02 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 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)
6.61 hash searches/s, 16.98 non-hash searches/s
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LOG
---
Log sequence number 128883650
Log flushed up to   128883630
Pages flushed up to 128806325
Last checkpoint at  128806325
0 pending log flushes, 0 pending chkp writes
315374 log i/o's done, 1.69 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 227864
Buffer pool size   1003
Free buffers       738
Database pages     257
Old database pages 0
Modified db pages  113
Percent of dirty pages(LRU & free pages): 11.345
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 62, not young 11475
0.00 youngs/s, 0.00 non-youngs/s
Pages read 212881, created 38204, written 791749
2.76 reads/s, 0.06 creates/s, 2.11 writes/s
Buffer pool hit rate 955 / 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: 257, unzip_LRU len: 0
I/O sum[201]:cur[7], 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=3164, Main thread ID=1248, state: sleeping
Number of rows inserted 74579, updated 28563, deleted 7, read 6287602
0.00 inserts/s, 1.31 updates/s, 0.00 deletes/s, 13.85 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 11102
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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