Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-04-02 14:18:31 0x7f53680b8700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 41 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 19 srv_active, 0 srv_shutdown, 144 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 49
OS WAIT ARRAY INFO: signal count 50
RW-shared spins 1, rounds 2, OS waits 1
RW-excl spins 1, rounds 31, OS waits 2
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 2.00 RW-shared, 31.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 9884
Purge done for trx's n:o < 9883 undo n:o < 0 state: running but idle
History list length 104
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421471188548200, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421471188547328, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
1431 OS file reads, 720 OS file writes, 277 OS fsyncs
1.02 reads/s, 15652 avg bytes/read, 0.98 writes/s, 0.56 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, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 25 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 29 buffer(s)
2425.14 hash searches/s, 351.94 non-hash searches/s
---
LOG
---
Log sequence number 51021595
Log buffer assigned up to 51021595
Log buffer completed up to 51021595
Log written up to 51021595
Log flushed up to 51021595
Added dirty pages up to 51021595
Pages flushed up to 51019277
Last checkpoint at 51019277
218 log i/o's done, 0.46 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 630700
Buffer pool size 8192
Free buffers 6657
Database pages 1469
Old database pages 532
Modified db pages 6
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 52, not young 339
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1312, created 160, written 425
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 1 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1469, unzip_LRU len: 0
I/O sum[26]:cur[20], 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=383, Main thread ID=139995702810368 , state=sleeping
Number of rows inserted 107, updated 416, deleted 0, read 530611
1.10 inserts/s, 0.17 updates/s, 0.00 deletes/s, 2848.78 reads/s
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END OF INNODB MONITOR OUTPUT
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