Motori di memorizzazione
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variabili
|
Buffer Pool
|
Stato InnoDB
]
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2025-12-19 07:05:45 0x7e2761f696c0 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 56 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 24292 srv_active, 0 srv_shutdown, 5492564 srv_idle
srv_master_thread log flush and writes: 5516802
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 279072
OS WAIT ARRAY INFO: signal count 115575
RW-shared spins 37245, rounds 1115366, OS waits 37060
RW-excl spins 2986, rounds 12724, OS waits 186
RW-sx spins 13, rounds 261, OS waits 8
Spin rounds per wait: 29.95 RW-shared, 4.26 RW-excl, 20.08 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 124748
Purge done for trx's n:o < 124748 undo n:o < 0 state: running but idle
History list length 2
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 420182342238592, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 420182342234376, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 420182342230160, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
83043 OS file reads, 328102 OS file writes, 215802 OS fsyncs
2.48 reads/s, 16384 avg bytes/read, 8.71 writes/s, 3.14 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 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 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
10.11 hash searches/s, 28.09 non-hash searches/s
---
LOG
---
Log sequence number 52984883
Log flushed up to 52984863
Pages flushed up to 52983475
Last checkpoint at 52977511
0 pending log flushes, 0 pending chkp writes
131039 log i/o's done, 2.23 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 178120
Buffer pool size 1003
Free buffers 742
Database pages 257
Old database pages 0
Modified db pages 3
Percent of dirty pages(LRU & free pages): 0.300
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 164, not young 3367
0.00 youngs/s, 0.00 non-youngs/s
Pages read 83009, created 2533, written 167914
6.66 reads/s, 0.00 creates/s, 19.33 writes/s
Buffer pool hit rate 975 / 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[485]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=284, Main thread ID=138707084494528, state: sleeping
Number of rows inserted 85816, updated 31164, deleted 327, read 7201662213
0.00 inserts/s, 1.68 updates/s, 0.00 deletes/s, 11.79 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 63533
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
============================
