Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variabler
|
Mellomlager
|
InnoDB status
]
=====================================
2026-03-23 13:45:00 0x7f58554e3700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 61 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 100 srv_active, 0 srv_shutdown, 752 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 193
OS WAIT ARRAY INFO: signal count 193
RW-shared spins 8, rounds 14, OS waits 6
RW-excl spins 4, rounds 120, OS waits 4
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.75 RW-shared, 30.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10351
Purge done for trx's n:o < 10344 undo n:o < 0 state: running but idle
History list length 20
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421492919630440, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421492919629568, 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
1616 OS file reads, 2875 OS file writes, 1156 OS fsyncs
0.05 reads/s, 16384 avg bytes/read, 1.03 writes/s, 0.26 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 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 5 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
1888.08 hash searches/s, 1257.67 non-hash searches/s
---
LOG
---
Log sequence number 51306695
Log buffer assigned up to 51306695
Log buffer completed up to 51306695
Log written up to 51306695
Log flushed up to 51306695
Added dirty pages up to 51306695
Pages flushed up to 51306695
Last checkpoint at 51306695
878 log i/o's done, 0.08 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 964607
Buffer pool size 8192
Free buffers 6531
Database pages 1640
Old database pages 618
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 587, not young 689867
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1419, created 515, written 1593
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: 1640, unzip_LRU len: 0
I/O sum[12]: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=363, Main thread ID=140017506875136 , state=sleeping
Number of rows inserted 98980, updated 719, deleted 3, read 3046012
537.93 inserts/s, 0.00 updates/s, 0.00 deletes/s, 2848.92 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
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