Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-09-16 03:59:35 0x7fe28aff9700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 34 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 62 srv_active, 0 srv_shutdown, 764 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 186
OS WAIT ARRAY INFO: signal count 188
RW-shared spins 24, rounds 44, OS waits 20
RW-excl spins 9, rounds 245, OS waits 8
RW-sx spins 1, rounds 3, OS waits 0
Spin rounds per wait: 1.83 RW-shared, 27.22 RW-excl, 3.00 RW-sx
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TRANSACTIONS
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Trx id counter 10485
Purge done for trx's n:o < 10485 undo n:o < 0 state: running but idle
History list length 51
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422086532782696, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422086532781824, 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
1555 OS file reads, 3536 OS file writes, 1337 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 2.91 writes/s, 1.03 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 2 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 1 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 7 buffer(s)
575.72 hash searches/s, 112.38 non-hash searches/s
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LOG
---
Log sequence number          51893017
Log buffer assigned up to    51893017
Log buffer completed up to   51893017
Log written up to            51893017
Log flushed up to            51893017
Added dirty pages up to      51893017
Pages flushed up to          51893017
Last checkpoint at           51893017
1388 log i/o's done, 1.12 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 908230
Buffer pool size   8192
Free buffers       6465
Database pages     1707
Old database pages 641
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 435, not young 87
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1406, created 404, written 1835
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: 1707, unzip_LRU len: 0
I/O sum[55]: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=372, Main thread ID=140611043657472 , state=sleeping
Number of rows inserted 33909, updated 1363, deleted 112, read 1015613
2.00 inserts/s, 0.59 updates/s, 0.00 deletes/s, 1013.44 reads/s
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END OF INNODB MONITOR OUTPUT
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