Motori di memorizzazione

InnoDB

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

[ Variabili | Buffer Pool | Stato InnoDB ]

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2026-01-29 10:47:51 0x1a38 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 52 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 3431 srv_active, 0 srv_shutdown, 489643 srv_idle
srv_master_thread log flush and writes: 493050
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 61960
OS WAIT ARRAY INFO: signal count 6462
RW-shared spins 3663, rounds 109558, OS waits 3413
RW-excl spins 90, rounds 1135, OS waits 17
RW-sx spins 4, rounds 175, OS waits 4
Spin rounds per wait: 29.91 RW-shared, 12.61 RW-excl, 43.75 RW-sx
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TRANSACTIONS
------------
Trx id counter 102173
Purge done for trx's n:o < 102173 undo n:o < 0 state: running
History list length 23
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283173487428016, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283173487423848, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283173487419680, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283173487411344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283173487415512, 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
9560 OS file reads, 41222 OS file writes, 25904 OS fsyncs
0.23 reads/s, 16384 avg bytes/read, 1.35 writes/s, 0.92 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
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 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)
2.63 hash searches/s, 5.54 non-hash searches/s
---
LOG
---
Log sequence number 94539662
Log flushed up to   94539642
Pages flushed up to 94539642
Last checkpoint at  94533304
0 pending log flushes, 0 pending chkp writes
15231 log i/o's done, 0.54 log i/o's/second
----------------------
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  1
Percent of dirty pages(LRU & free pages): 0.100
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 9502, created 385, written 22112
0.23 reads/s, 0.02 creates/s, 0.67 writes/s
Buffer pool hit rate 983 / 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[34]:cur[14], 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=3952, Main thread ID=3844, state: sleeping
Number of rows inserted 51, updated 4884, deleted 43, read 65588
0.00 inserts/s, 0.21 updates/s, 0.00 deletes/s, 2.58 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 5130
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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