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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2025-03-15 19:32:25 0x274 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 48 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 3049 srv_active, 0 srv_shutdown, 2351990 srv_idle
srv_master_thread log flush and writes: 2355039
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 13244
OS WAIT ARRAY INFO: signal count 10030
RW-shared spins 6241, rounds 179633, OS waits 5846
RW-excl spins 587, rounds 7495, OS waits 95
RW-sx spins 2, rounds 0, OS waits 0
Spin rounds per wait: 28.78 RW-shared, 12.77 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 145982
Purge done for trx's n:o < 145982 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283087526830296, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283087526826128, 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: 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
13059 OS file reads, 67431 OS file writes, 33544 OS fsyncs
0.27 reads/s, 16384 avg bytes/read, 2.75 writes/s, 1.98 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 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)
3.48 hash searches/s, 9.46 non-hash searches/s
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LOG
---
Log sequence number 19683702
Log flushed up to   19683702
Pages flushed up to 19683702
Last checkpoint at  19683693
0 pending log flushes, 0 pending chkp writes
21669 log i/o's done, 1.21 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 135216
Buffer pool size   1003
Free buffers       742
Database pages     256
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 13001, created 336, written 41316
0.27 reads/s, 0.00 creates/s, 1.27 writes/s
Buffer pool hit rate 990 / 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: 256, unzip_LRU len: 0
I/O sum[80]: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=3380, Main thread ID=4608, state: sleeping
Number of rows inserted 660, updated 9899, deleted 67, read 84847269
0.00 inserts/s, 0.27 updates/s, 0.00 deletes/s, 3.00 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 4321
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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