Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-06-29 16:07:08 0x7fe36c20c700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 15 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 31 srv_active, 0 srv_shutdown, 349 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 99
OS WAIT ARRAY INFO: signal count 95
RW-shared spins 7, rounds 11, OS waits 4
RW-excl spins 7, rounds 126, OS waits 5
RW-sx spins 1, rounds 1, OS waits 0
Spin rounds per wait: 1.57 RW-shared, 18.00 RW-excl, 1.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 9985
Purge done for trx's n:o < 9980 undo n:o < 0 state: running but idle
History list length 56
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422090263280232, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422090263279360, 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
1370 OS file reads, 1149 OS file writes, 431 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 3.13 writes/s, 2.00 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 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 1 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
340.78 hash searches/s, 98.33 non-hash searches/s
---
LOG
---
Log sequence number 51068884
Log buffer assigned up to 51068884
Log buffer completed up to 51068884
Log written up to 51068884
Log flushed up to 51068884
Added dirty pages up to 51068884
Pages flushed up to 51062950
Last checkpoint at 51062950
352 log i/o's done, 2.07 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 684442
Buffer pool size 8192
Free buffers 6758
Database pages 1415
Old database pages 509
Modified db pages 25
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 121, not young 29
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1251, created 167, written 687
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: 1415, unzip_LRU len: 0
I/O sum[150]:cur[8], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=362, Main thread ID=140614777882368 , state=sleeping
Number of rows inserted 137, updated 486, deleted 0, read 2990716
0.00 inserts/s, 1.00 updates/s, 0.00 deletes/s, 644.56 reads/s
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END OF INNODB MONITOR OUTPUT
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