Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2025-06-28 03:06:13 0x15cfb4 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 2 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 3519 srv_active, 0 srv_shutdown, 1456781 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 1401
OS WAIT ARRAY INFO: signal count 1365
RW-shared spins 0, rounds 0, 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: 0.00 RW-shared, 0.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 106663
Purge done for trx's n:o < 106663 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284206717539584, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284206717538808, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284206717538032, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: wait Windows aio (insert buffer thread)
I/O thread 1 state: wait Windows aio (read thread)
I/O thread 2 state: wait Windows aio (read thread)
I/O thread 3 state: wait Windows aio (read thread)
I/O thread 4 state: wait Windows aio (read thread)
I/O thread 5 state: wait Windows aio (write thread)
I/O thread 6 state: wait Windows aio (write thread)
I/O thread 7 state: wait Windows aio (write thread)
I/O thread 8 state: wait Windows aio (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
 ibuf aio reads:
Pending flushes (fsync) log: 0; buffer pool: 0
1658 OS file reads, 259139 OS file writes, 35695 OS fsyncs
0.00 reads/s, 0 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 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
0.00 hash searches/s, 1.00 non-hash searches/s
---
LOG
---
Log sequence number          147286150
Log buffer assigned up to    147286150
Log buffer completed up to   147286150
Log written up to            147286150
Log flushed up to            147286150
Added dirty pages up to      147286150
Pages flushed up to          147286150
Last checkpoint at           147286150
Log minimum file id is       42
Log maximum file id is       44
33678 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6295
Database pages     1896
Old database pages 706
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 98466, not young 188300
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1635, created 167294, written 143016
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: 1896, unzip_LRU len: 0
I/O sum[0]: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=9976, Main thread ID=11984 , state=sleeping
Number of rows inserted 15089387, updated 0, deleted 0, read 14777953
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 8, updated 20375, deleted 8, read 101370282
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.50 reads/s
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END OF INNODB MONITOR OUTPUT
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