Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-06-29 15:54:19 0x7fe30c06b700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 24 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 29 srv_active, 0 srv_shutdown, 482 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 126
OS WAIT ARRAY INFO: signal count 126
RW-shared spins 7, rounds 11, OS waits 4
RW-excl spins 7, rounds 210, OS waits 7
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.57 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 10183
Purge done for trx's n:o < 10180 undo n:o < 0 state: running but idle
History list length 43
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422088671488616, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422088671487744, 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
1508 OS file reads, 1921 OS file writes, 667 OS fsyncs
0.04 reads/s, 16384 avg bytes/read, 8.79 writes/s, 3.92 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 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 0 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 7 buffer(s)
487.60 hash searches/s, 139.29 non-hash searches/s
---
LOG
---
Log sequence number 51225363
Log buffer assigned up to 51225363
Log buffer completed up to 51225363
Log written up to 51225363
Log flushed up to 51225363
Added dirty pages up to 51225363
Pages flushed up to 51225115
Last checkpoint at 51225115
668 log i/o's done, 3.28 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 723771
Buffer pool size 8192
Free buffers 6608
Database pages 1568
Old database pages 558
Modified db pages 3
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 99, not young 3
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1373, created 198, written 1124
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 1 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1568, unzip_LRU len: 0
I/O sum[120]:cur[0], 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=377, Main thread ID=140613182748416 , state=sleeping
Number of rows inserted 304, updated 740, deleted 0, read 542229
0.71 inserts/s, 1.75 updates/s, 0.00 deletes/s, 1362.28 reads/s
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END OF INNODB MONITOR OUTPUT
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