Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2025-07-27 08:08:54 0xc65f4 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 15 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 138 srv_active, 0 srv_shutdown, 1531197 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 302
OS WAIT ARRAY INFO: signal count 292
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 152043
Purge done for trx's n:o < 152043 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284433613001984, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284433613001208, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284433613000432, 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
1165 OS file reads, 4804 OS file writes, 1592 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, 1919.07 non-hash searches/s
---
LOG
---
Log sequence number          155028442
Log buffer assigned up to    155028442
Log buffer completed up to   155028442
Log written up to            155028442
Log flushed up to            155028442
Added dirty pages up to      155028442
Pages flushed up to          155028442
Last checkpoint at           155028442
Log minimum file id is       47
Log maximum file id is       47
952 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 594867
Buffer pool size   8191
Free buffers       6815
Database pages     1376
Old database pages 487
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1988, not young 194
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1142, created 1273, written 2886
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: 1376, 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=9680, Main thread ID=12712 , state=sleeping
Number of rows inserted 99108, updated 0, deleted 0, read 99457
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.07 reads/s
Number of system rows inserted 8, updated 825, deleted 8, read 3109736
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1152.86 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================