Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-02-19 05:13:18 0x21d4 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 16 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 6505 srv_active, 0 srv_shutdown, 2108041 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 115870
OS WAIT ARRAY INFO: signal count 115292
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 5422
Purge done for trx's n:o < 5421 undo n:o < 0 state: running but idle
History list length 12
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284319399615056, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399614280, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399613504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399617384, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399618936, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399615832, 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)
--------
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, 19556 OS file writes, 9147 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.98 writes/s, 0.80 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)
1001.75 hash searches/s, 674.27 non-hash searches/s
---
LOG
---
Log sequence number          20025585
Log buffer assigned up to    20025585
Log buffer completed up to   20025585
Log written up to            20025585
Log flushed up to            20025585
Added dirty pages up to      20025585
Pages flushed up to          20023795
Last checkpoint at           20023795
Log minimum file id is       5
Log maximum file id is       6
3999 log i/o's done, 1.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6763
Database pages     1407
Old database pages 522
Modified db pages  14
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 7220, not young 2932
0.12 youngs/s, 0.00 non-youngs/s
Pages read 974, created 5199, written 9819
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: 1407, unzip_LRU len: 0
I/O sum[18]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
1 read views open inside InnoDB
Process ID=6040, Main thread ID=4252 , state=sleeping
Number of rows inserted 388319, updated 0, deleted 0, read 328792
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 140, updated 1871, deleted 8, read 5094893
0.00 inserts/s, 0.37 updates/s, 0.00 deletes/s, 1236.17 reads/s
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END OF INNODB MONITOR OUTPUT
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