Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2026-01-27 23:16:00 128072818882240 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 38 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 12134 srv_active, 0 srv_shutdown, 5922198 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 118425
OS WAIT ARRAY INFO: signal count 117078
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 734762
Purge done for trx's n:o < 734762 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 409547770435960, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770440000, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770439192, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770437576, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770436768, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770433536, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770435152, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770434344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770432728, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770431920, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 409547770431112, not started
0 lock struct(s), heap size 1128, 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 (read 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 (write 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)
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
2032 OS file reads, 206487 OS file writes, 155379 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.62 writes/s, 0.13 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 11 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 2 buffer(s)
Hash table size 34679, node heap has 9 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 11 buffer(s)
Hash table size 34679, node heap has 9 buffer(s)
2482.38 hash searches/s, 1847.90 non-hash searches/s
---
LOG
---
Log sequence number          211321638
Log buffer assigned up to    211321638
Log buffer completed up to   211321638
Log written up to            211321638
Log flushed up to            211321638
Added dirty pages up to      211321638
Pages flushed up to          211321638
Last checkpoint at           211321638
Log minimum file id is       59
Log maximum file id is       64
55066 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 705673
Buffer pool size   8191
Free buffers       5668
Database pages     2471
Old database pages 931
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 82667, not young 64509
6.04 youngs/s, 9.23 non-youngs/s
Pages read 1990, created 55525, written 106606
0.00 reads/s, 8.42 creates/s, 0.49 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: 2471, unzip_LRU len: 0
I/O sum[19]: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=1854014, Main thread ID=128072254752448 , state=sleeping
Number of rows inserted 4629430, updated 5168, deleted 228, read 255299880
687.85 inserts/s, 0.00 updates/s, 0.00 deletes/s, 13471.78 reads/s
Number of system rows inserted 2356, updated 11969, deleted 2156, read 174262513
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 3113.42 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================