Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-12-23 17:55:18 0x7fa5ec0aa700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 21 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 43 srv_active, 0 srv_shutdown, 526 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 111
OS WAIT ARRAY INFO: signal count 110
RW-shared spins 1, rounds 1, OS waits 0
RW-excl spins 1, rounds 30, OS waits 1
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.00 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 10011
Purge done for trx's n:o < 10011 undo n:o < 0 state: running but idle
History list length 7
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421825749244520, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421825749243648, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
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I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
 ibuf aio reads:, log i/o's:, sync i/o's:
Pending flushes (fsync) log: 0; buffer pool: 0
1439 OS file reads, 1494 OS file writes, 437 OS fsyncs
0.19 reads/s, 12544 avg bytes/read, 0.71 writes/s, 0.43 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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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 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 25 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 32 buffer(s)
637.64 hash searches/s, 373.08 non-hash searches/s
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LOG
---
Log sequence number          51010706
Log buffer assigned up to    51010706
Log buffer completed up to   51010706
Log written up to            51010706
Log flushed up to            51010706
Added dirty pages up to      51010706
Pages flushed up to          51010706
Last checkpoint at           51010706
305 log i/o's done, 0.27 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 137363456
Dictionary memory allocated 694409
Buffer pool size   8192
Free buffers       6674
Database pages     1444
Old database pages 519
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 430, not young 196864
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1298, created 421, written 944
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: 1444, unzip_LRU len: 0
I/O sum[11]: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=380, Main thread ID=140350264116992 , state=sleeping
Number of rows inserted 82079, updated 428, deleted 0, read 594961
0.00 inserts/s, 0.10 updates/s, 0.00 deletes/s, 1171.75 reads/s
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END OF INNODB MONITOR OUTPUT
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