Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-07-07 06:04:41 0x7fb524059700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 49 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 15 srv_active, 0 srv_shutdown, 217 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 40
OS WAIT ARRAY INFO: signal count 39
RW-shared spins 4, rounds 7, OS waits 3
RW-excl spins 8, rounds 202, OS waits 6
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.75 RW-shared, 25.25 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 9813
Purge done for trx's n:o < 9812 undo n:o < 0 state: running but idle
History list length 73
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421891475651176, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421891475650304, 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
1235 OS file reads, 569 OS file writes, 223 OS fsyncs
0.02 reads/s, 16384 avg bytes/read, 1.82 writes/s, 0.61 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 1 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 2 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
239.20 hash searches/s, 85.71 non-hash searches/s
---
LOG
---
Log sequence number 50985944
Log buffer assigned up to 50985944
Log buffer completed up to 50985944
Log written up to 50985944
Log flushed up to 50985944
Added dirty pages up to 50985944
Pages flushed up to 50985944
Last checkpoint at 50985944
138 log i/o's done, 0.42 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 579961
Buffer pool size 8192
Free buffers 6909
Database pages 1268
Old database pages 487
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1120, created 148, written 354
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: 1268, unzip_LRU len: 0
I/O sum[0]: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=369, Main thread ID=140415991756544 , state=sleeping
Number of rows inserted 25, updated 349, deleted 17, read 189930
0.02 inserts/s, 0.00 updates/s, 0.35 deletes/s, 587.99 reads/s
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END OF INNODB MONITOR OUTPUT
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