Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-11-09 20:53:21 0x7f37c40a1700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 26 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 46 srv_active, 0 srv_shutdown, 406 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 147
OS WAIT ARRAY INFO: signal count 147
RW-shared spins 0, rounds 0, OS waits 0
RW-excl spins 1, rounds 30, OS waits 1
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 RW-shared, 30.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10147
Purge done for trx's n:o < 10147 undo n:o < 0 state: running but idle
History list length 28
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421352930540136, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421352930539264, 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
1622 OS file reads, 1484 OS file writes, 522 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.12 writes/s, 0.04 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 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 4 buffer(s)
Hash table size 34679, node heap has 32 buffer(s)
674.36 hash searches/s, 248.64 non-hash searches/s
---
LOG
---
Log sequence number 51029859
Log buffer assigned up to 51029859
Log buffer completed up to 51029859
Log written up to 51029859
Log flushed up to 51029859
Added dirty pages up to 51029859
Pages flushed up to 51029859
Last checkpoint at 51029859
440 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 821972
Buffer pool size 8192
Free buffers 6563
Database pages 1583
Old database pages 586
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 340, not young 365078
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1437, created 422, written 804
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: 1583, unzip_LRU len: 0
I/O sum[100]: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=368, Main thread ID=139877514397440 , state=sleeping
Number of rows inserted 82171, updated 454, deleted 0, read 763947
1.73 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1133.46 reads/s
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END OF INNODB MONITOR OUTPUT
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