Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variabler
|
Mellomlager
|
InnoDB status
]
=====================================
2026-03-23 15:18:55 0x7fd7608dc700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 8 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 11 srv_active, 0 srv_shutdown, 177 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 24
OS WAIT ARRAY INFO: signal count 24
RW-shared spins 1, rounds 1, OS waits 0
RW-excl spins 0, rounds 0, OS waits 0
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.00 RW-shared, 0.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 9786
Purge done for trx's n:o < 9781 undo n:o < 0 state: running but idle
History list length 64
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422038850239080, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422038850238208, 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
1209 OS file reads, 406 OS file writes, 131 OS fsyncs
2.50 reads/s, 16384 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
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 0 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)
4427.82 hash searches/s, 3405.07 non-hash searches/s
---
LOG
---
Log sequence number 50958173
Log buffer assigned up to 50958173
Log buffer completed up to 50958173
Log written up to 50958173
Log flushed up to 50958173
Added dirty pages up to 50958173
Pages flushed up to 50958173
Last checkpoint at 50958173
82 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 539341
Buffer pool size 8192
Free buffers 6932
Database pages 1246
Old database pages 441
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 51, not young 647
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1104, created 232, written 227
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 4 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1246, unzip_LRU len: 0
I/O sum[29]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=367, Main thread ID=140563435407104 , state=sleeping
Number of rows inserted 16394, updated 331, deleted 0, read 549089
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 5978.50 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
