Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-09-16 23:53:38 0x205c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 26 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 425 srv_active, 0 srv_shutdown, 137371 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 5161
OS WAIT ARRAY INFO: signal count 5128
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 17268
Purge done for trx's n:o < 17263 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284214165117664, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284214165116888, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284214165114560, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284214165113784, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284214165113008, 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
1712 OS file reads, 2035 OS file writes, 853 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.26 writes/s, 0.19 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 1 buffer(s)
561.52 hash searches/s, 533.94 non-hash searches/s
---
LOG
---
Log sequence number          21715741
Log buffer assigned up to    21715741
Log buffer completed up to   21715741
Log written up to            21715741
Log flushed up to            21715741
Added dirty pages up to      21715741
Pages flushed up to          21715731
Last checkpoint at           21715731
Log minimum file id is       6
Log maximum file id is       6
371 log i/o's done, 0.04 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6872
Database pages     1299
Old database pages 459
Modified db pages  1
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 830, not young 1841
0.15 youngs/s, 0.00 non-youngs/s
Pages read 1159, created 474, written 1053
0.00 reads/s, 0.00 creates/s, 0.15 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: 1299, unzip_LRU len: 0
I/O sum[7]: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=5288, Main thread ID=8728 , state=sleeping
Number of rows inserted 25946, updated 0, deleted 0, read 25567
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 8, updated 497, deleted 8, read 384813
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 708.78 reads/s
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END OF INNODB MONITOR OUTPUT
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