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 20:57:22 0x1c40 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 35 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 11272 srv_active, 0 srv_shutdown, 664006 srv_idle
srv_master_thread log flush and writes: 675274
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 165510
OS WAIT ARRAY INFO: signal count 44424
RW-shared spins 19982, rounds 588418, OS waits 18662
RW-excl spins 1698, rounds 23430, OS waits 562
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 29.45 RW-shared, 13.80 RW-excl, 30.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 108790
Purge done for trx's n:o < 108786 undo n:o < 0 state: running
History list length 7
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283284070367736, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283284070363568, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283284070376072, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283284070359400, 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 283284070355232, 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)
--------
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
70251 OS file reads, 169451 OS file writes, 88161 OS fsyncs
2.63 reads/s, 16384 avg bytes/read, 5.83 writes/s, 2.77 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
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 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)
5.54 hash searches/s, 14.89 non-hash searches/s
---
LOG
---
Log sequence number 52024419
Log flushed up to   52024419
Pages flushed up to 52020025
Last checkpoint at  52017774
0 pending log flushes, 0 pending chkp writes
47308 log i/o's done, 1.60 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 112680
Buffer pool size   1003
Free buffers       736
Database pages     260
Old database pages 0
Modified db pages  9
Percent of dirty pages(LRU & free pages): 0.903
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 70202, created 864, written 108661
2.63 reads/s, 0.03 creates/s, 3.83 writes/s
Buffer pool hit rate 947 / 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: 260, unzip_LRU len: 0
I/O sum[305]:cur[11], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
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 12013, deleted 0, read 17602865
0.00 inserts/s, 0.97 updates/s, 0.00 deletes/s, 5.66 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 19934
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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