Motori di memorizzazione

InnoDB

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

[ Variabili | Buffer Pool | Stato InnoDB ]

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2026-04-23 15:30:34 0xcac INNODB MONITOR OUTPUT
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Per second averages calculated from the last 64 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 561 srv_active, 0 srv_shutdown, 416067 srv_idle
srv_master_thread log flush and writes: 416628
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 23476
OS WAIT ARRAY INFO: signal count 3887
RW-shared spins 1057, rounds 31164, OS waits 1007
RW-excl spins 99, rounds 2386, OS waits 67
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.48 RW-shared, 24.10 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 878514
Purge done for trx's n:o < 878514 undo n:o < 0 state: running
History list length 9
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283653736263968, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736255632, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736268136, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736297312, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736272304, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283653736259800, 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
7292 OS file reads, 9563 OS file writes, 4819 OS fsyncs
2.62 reads/s, 16384 avg bytes/read, 6.00 writes/s, 2.97 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 143, seg size 145, 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 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)
7.44 hash searches/s, 18.42 non-hash searches/s
---
LOG
---
Log sequence number 1276986430
Log flushed up to   1276986430
Pages flushed up to 1276975694
Last checkpoint at  1276973096
0 pending log flushes, 0 pending chkp writes
2997 log i/o's done, 2.11 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 518328
Buffer pool size   1003
Free buffers       735
Database pages     261
Old database pages 0
Modified db pages  37
Percent of dirty pages(LRU & free pages): 3.711
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 58, not young 9169
0.00 youngs/s, 0.00 non-youngs/s
Pages read 7076, created 238, written 5772
2.62 reads/s, 0.06 creates/s, 3.50 writes/s
Buffer pool hit rate 965 / 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[257]:cur[2], 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=3124, Main thread ID=4516, state: sleeping
Number of rows inserted 0, updated 1947, deleted 0, read 308835
0.00 inserts/s, 1.62 updates/s, 0.00 deletes/s, 7.22 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 9437
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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