Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-02-18 02:21:16 0x1008 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 22 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 5364 srv_active, 0 srv_shutdown, 2013515 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 110240
OS WAIT ARRAY INFO: signal count 109690
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
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TRANSACTIONS
------------
Trx id counter 4945
Purge done for trx's n:o < 4940 undo n:o < 0 state: running but idle
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284319399613504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399612728, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399611952, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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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
1526 OS file reads, 16131 OS file writes, 8120 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.26 writes/s, 0.22 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 7 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 3 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)
410.84 hash searches/s, 395.62 non-hash searches/s
---
LOG
---
Log sequence number          19969796
Log buffer assigned up to    19969796
Log buffer completed up to   19969796
Log written up to            19969796
Log flushed up to            19969796
Added dirty pages up to      19969796
Pages flushed up to          19969776
Last checkpoint at           19969776
Log minimum file id is       5
Log maximum file id is       6
3556 log i/o's done, 0.09 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6849
Database pages     1321
Old database pages 500
Modified db pages  1
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 5298, not young 1368
0.00 youngs/s, 0.00 non-youngs/s
Pages read 974, created 2846, written 8344
0.00 reads/s, 0.00 creates/s, 0.09 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: 1321, unzip_LRU len: 0
I/O sum[2]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=6040, Main thread ID=4252 , state=sleeping
Number of rows inserted 195738, updated 0, deleted 0, read 169439
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 140, updated 1705, deleted 8, read 3192613
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 580.29 reads/s
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END OF INNODB MONITOR OUTPUT
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