Motori di memorizzazione

InnoDB

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

[ Variabili | Buffer Pool | Stato InnoDB ]

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2026-09-01 07:25:10 0x860 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 36 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 8188 srv_active, 0 srv_shutdown, 2623231 srv_idle
srv_master_thread log flush and writes: 2631299
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 117013
OS WAIT ARRAY INFO: signal count 11008
RW-shared spins 3325, rounds 99560, OS waits 3186
RW-excl spins 112, rounds 3003, OS waits 90
RW-sx spins 8, rounds 242, OS waits 5
Spin rounds per wait: 29.94 RW-shared, 26.81 RW-excl, 30.25 RW-sx
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TRANSACTIONS
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Trx id counter 158042
Purge done for trx's n:o < 158042 undo n:o < 0 state: running but idle
History list length 49
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284534940700888, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284534940696720, 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
21533 OS file reads, 89521 OS file writes, 51822 OS fsyncs
4.28 reads/s, 16384 avg bytes/read, 9.75 writes/s, 4.64 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 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)
13.67 hash searches/s, 36.97 non-hash searches/s
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LOG
---
Log sequence number 123851357
Log flushed up to   123851337
Pages flushed up to 123843084
Last checkpoint at  123839684
0 pending log flushes, 0 pending chkp writes
26690 log i/o's done, 3.00 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       739
Database pages     257
Old database pages 0
Modified db pages  18
Percent of dirty pages(LRU & free pages): 1.805
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 21475, created 596, written 54016
4.28 reads/s, 0.17 creates/s, 6.14 writes/s
Buffer pool hit rate 957 / 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[568]: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=7612, Main thread ID=5676, state: sleeping
Number of rows inserted 96, updated 11448, deleted 83, read 365273
0.00 inserts/s, 2.19 updates/s, 0.00 deletes/s, 20.05 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 31708
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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