Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-11-16 04:42:55 0x7f9240136700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 56 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 67 srv_active, 0 srv_shutdown, 660 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 698
OS WAIT ARRAY INFO: signal count 592
RW-shared spins 79, rounds 143, OS waits 64
RW-excl spins 229, rounds 1635, OS waits 27
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 1.81 RW-shared, 7.14 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 10426
Purge done for trx's n:o < 10426 undo n:o < 0 state: running but idle
History list length 19
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421741263231592, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421741263230720, 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
1435 OS file reads, 4054 OS file writes, 1246 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 7 buffer(s)
386.35 hash searches/s, 195.35 non-hash searches/s
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LOG
---
Log sequence number          52339665
Log buffer assigned up to    52339665
Log buffer completed up to   52339665
Log written up to            52339665
Log flushed up to            52339665
Added dirty pages up to      52339665
Pages flushed up to          52339665
Last checkpoint at           52339665
1669 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 561747
Buffer pool size   8192
Free buffers       6656
Database pages     1510
Old database pages 568
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 680, not young 678
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1289, created 342, written 2113
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: 1510, unzip_LRU len: 0
I/O sum[0]: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=375, Main thread ID=140265776944896 , state=sleeping
Number of rows inserted 33813, updated 1988, deleted 1592, read 498918
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 709.86 reads/s
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END OF INNODB MONITOR OUTPUT
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