Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variabler
|
Buffertutrymme
|
InnoDB-status
]
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2026-04-02 13:52:24 0x7f13c0d84700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 29 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 32 srv_active, 0 srv_shutdown, 363 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 56
OS WAIT ARRAY INFO: signal count 56
RW-shared spins 1, rounds 2, OS waits 1
RW-excl spins 3, rounds 91, OS waits 4
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 2.00 RW-shared, 30.33 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 9881
Purge done for trx's n:o < 9881 undo n:o < 0 state: running but idle
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421198376090216, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421198376089344, 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
1296 OS file reads, 926 OS file writes, 376 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 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 0 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 7 buffer(s)
2572.12 hash searches/s, 1830.01 non-hash searches/s
---
LOG
---
Log sequence number 51013939
Log buffer assigned up to 51013939
Log buffer completed up to 51013939
Log written up to 51013939
Log flushed up to 51013939
Added dirty pages up to 51013939
Pages flushed up to 51013939
Last checkpoint at 51013939
223 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 635874
Buffer pool size 8192
Free buffers 6848
Database pages 1325
Old database pages 478
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 30, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1171, created 157, written 589
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: 1325, unzip_LRU len: 0
I/O sum[1]: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=139722891409152 , state=sleeping
Number of rows inserted 151, updated 388, deleted 0, read 1867169
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 3421.68 reads/s
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END OF INNODB MONITOR OUTPUT
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