Motori di memorizzazione

InnoDB

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

[ Variabili | Buffer Pool | Stato InnoDB ]

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2026-03-24 22:30:09 0x3a0c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 3 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 11585 srv_active, 0 srv_shutdown, 669213 srv_idle
srv_master_thread log flush and writes: 680794
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 173526
OS WAIT ARRAY INFO: signal count 45555
RW-shared spins 20248, rounds 596345, OS waits 18919
RW-excl spins 1704, rounds 23589, OS waits 566
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 29.45 RW-shared, 13.84 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 110254
Purge done for trx's n:o < 110254 undo n:o < 0 state: running but idle
History list length 11
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283284070355232, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283284070351064, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283284070346896, 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
71546 OS file reads, 174254 OS file writes, 90678 OS fsyncs
11.66 reads/s, 16384 avg bytes/read, 13.33 writes/s, 7.66 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, 1251 merges
merged operations:
 insert 2634, 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)
18.33 hash searches/s, 50.65 non-hash searches/s
---
LOG
---
Log sequence number 52941848
Log flushed up to   52941812
Pages flushed up to 52928885
Last checkpoint at  52921519
0 pending log flushes, 0 pending chkp writes
48844 log i/o's done, 5.33 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 112680
Buffer pool size   1003
Free buffers       734
Database pages     261
Old database pages 0
Modified db pages  49
Percent of dirty pages(LRU & free pages): 4.920
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1793, not young 401231
0.00 youngs/s, 0.00 non-youngs/s
Pages read 71497, created 890, written 111563
11.66 reads/s, 0.67 creates/s, 7.00 writes/s
Buffer pool hit rate 941 / 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: 261, unzip_LRU len: 0
I/O sum[227]:cur[8], 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=11568, Main thread ID=10748, state: sleeping
Number of rows inserted 8779, updated 12744, deleted 0, read 17636891
0.00 inserts/s, 4.33 updates/s, 0.00 deletes/s, 17.66 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 20726
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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