Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2025-11-23 01:19:30 0x7fab70056700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 40 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 10 srv_active, 0 srv_shutdown, 213 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 8
OS WAIT ARRAY INFO: signal count 8
RW-shared spins 0, rounds 0, 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: 0.00 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 9787
Purge done for trx's n:o < 9786 undo n:o < 0 state: running but idle
History list length 67
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421849304959592, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421849304958720, 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
1217 OS file reads, 336 OS file writes, 114 OS fsyncs
0.22 reads/s, 14677 avg bytes/read, 0.65 writes/s, 0.32 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 1 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
607.71 hash searches/s, 316.67 non-hash searches/s
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LOG
---
Log sequence number          50957436
Log buffer assigned up to    50957436
Log buffer completed up to   50957436
Log written up to            50957436
Log flushed up to            50957436
Added dirty pages up to      50957436
Pages flushed up to          50957436
Last checkpoint at           50957436
69 log i/o's done, 0.28 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 795560
Buffer pool size   8192
Free buffers       6925
Database pages     1253
Old database pages 482
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1110, created 143, written 219
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: 1253, 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=359, Main thread ID=140373819328256 , state=sleeping
Number of rows inserted 3, updated 334, deleted 0, read 168322
0.00 inserts/s, 0.12 updates/s, 0.00 deletes/s, 944.28 reads/s
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END OF INNODB MONITOR OUTPUT
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