Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-02-17 22:51:28 0x18e8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 27 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 4899 srv_active, 0 srv_shutdown, 2001549 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 108316
OS WAIT ARRAY INFO: signal count 107772
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 4806
Purge done for trx's n:o < 4806 undo n:o < 0 state: running but idle
History list length 2
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)
--------
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
1512 OS file reads, 15080 OS file writes, 7809 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.55 writes/s, 0.37 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)
499.06 hash searches/s, 412.02 non-hash searches/s
---
LOG
---
Log sequence number          19955037
Log buffer assigned up to    19955037
Log buffer completed up to   19955037
Log written up to            19955037
Log flushed up to            19955037
Added dirty pages up to      19955037
Pages flushed up to          19954460
Last checkpoint at           19954460
Log minimum file id is       5
Log maximum file id is       6
3411 log i/o's done, 0.22 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6847
Database pages     1323
Old database pages 469
Modified db pages  6
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 4643, not young 476
0.00 youngs/s, 0.00 non-youngs/s
Pages read 960, created 2037, written 7931
0.00 reads/s, 0.00 creates/s, 0.22 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: 1323, unzip_LRU len: 0
I/O sum[6]: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 128583, updated 0, deleted 0, read 102716
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 140, updated 1663, deleted 8, read 2241903
0.00 inserts/s, 0.07 updates/s, 0.00 deletes/s, 597.05 reads/s
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END OF INNODB MONITOR OUTPUT
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