Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-11-19 05:03:57 0x7f264c0f2700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 7 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 41 srv_active, 0 srv_shutdown, 148 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 88
OS WAIT ARRAY INFO: signal count 86
RW-shared spins 0, rounds 0, OS waits 0
RW-excl spins 7, rounds 210, OS waits 6
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 9974
Purge done for trx's n:o < 9974 undo n:o < 0 state: running but idle
History list length 49
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421277622286952, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421277622286080, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
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
1429 OS file reads, 1156 OS file writes, 452 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 1.00 writes/s, 0.86 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 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
412.66 hash searches/s, 144.41 non-hash searches/s
---
LOG
---
Log sequence number 51015611
Log buffer assigned up to 51015611
Log buffer completed up to 51015611
Log written up to 51015611
Log flushed up to 51015611
Added dirty pages up to 51015611
Pages flushed up to 51015027
Last checkpoint at 51015027
298 log i/o's done, 0.57 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 832054
Buffer pool size 8192
Free buffers 6737
Database pages 1432
Old database pages 508
Modified db pages 4
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 422, not young 226
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1282, created 341, written 647
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 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: 1432, unzip_LRU len: 0
I/O sum[32]: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=366, Main thread ID=139802138588928 , state=sleeping
Number of rows inserted 49386, updated 411, deleted 0, read 2097480
0.14 inserts/s, 0.14 updates/s, 0.00 deletes/s, 1076.85 reads/s
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END OF INNODB MONITOR OUTPUT
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