Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-06-29 07:52:20 0x7f9b425fc700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 27 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 34 srv_active, 0 srv_shutdown, 358 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 79
OS WAIT ARRAY INFO: signal count 80
RW-shared spins 0, rounds 0, OS waits 0
RW-excl spins 2, rounds 60, OS waits 2
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 10046
Purge done for trx's n:o < 10046 undo n:o < 0 state: running but idle
History list length 73
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421780849556072, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421780849555200, 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
1581 OS file reads, 956 OS file writes, 333 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.11 writes/s, 0.04 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 1 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 0 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 5 buffer(s)
755.49 hash searches/s, 387.13 non-hash searches/s
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LOG
---
Log sequence number          51001147
Log buffer assigned up to    51001147
Log buffer completed up to   51001147
Log written up to            51001147
Log flushed up to            51001147
Added dirty pages up to      51001147
Pages flushed up to          51001147
Last checkpoint at           51001147
270 log i/o's done, 0.00 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 821972
Buffer pool size   8192
Free buffers       6622
Database pages     1555
Old database pages 559
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 331, not young 495
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1408, created 171, written 589
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: 1555, unzip_LRU len: 0
I/O sum[1]: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=368, Main thread ID=140305362781952 , state=sleeping
Number of rows inserted 364, updated 426, deleted 0, read 348836
1.67 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1133.51 reads/s
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END OF INNODB MONITOR OUTPUT
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