Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2025-06-27 23:20:17 0x540 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 44 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 3105 srv_active, 0 srv_shutdown, 1443772 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 1346
OS WAIT ARRAY INFO: signal count 1310
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 106467
Purge done for trx's n:o < 106467 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, 215670 OS file writes, 35043 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, 600.33 non-hash searches/s
---
LOG
---
Log sequence number          147251428
Log buffer assigned up to    147251428
Log buffer completed up to   147251428
Log written up to            147251428
Log flushed up to            147251428
Added dirty pages up to      147251428
Pages flushed up to          147251428
Last checkpoint at           147251428
Log minimum file id is       42
Log maximum file id is       44
33502 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       6208
Database pages     1983
Old database pages 712
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 81529, not young 135854
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1635, created 131708, written 116766
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: 1983, 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 11853699, updated 0, deleted 0, read 11541691
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 8, updated 20277, deleted 8, read 94247934
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 406.08 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================