Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Variables | Buffer Pool | InnoDB Status ]

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2025-07-14 04:44:12 0x2328 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 18 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 8556 srv_active, 0 srv_shutdown, 382525 srv_idle
srv_master_thread log flush and writes: 391081
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 255602
OS WAIT ARRAY INFO: signal count 48002
RW-shared spins 0, rounds 63191, OS waits 26374
RW-excl spins 0, rounds 213881, OS waits 3388
RW-sx spins 1618, rounds 23815, OS waits 323
Spin rounds per wait: 63191.00 RW-shared, 213881.00 RW-excl, 14.72 RW-sx
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TRANSACTIONS
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Trx id counter 3813236
Purge done for trx's n:o < 3813236 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282943159542072, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 282943159537856, 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: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (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
457064 OS file reads, 172618 OS file writes, 108514 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 23, seg size 25, 1448 merges
merged operations:
 insert 10087, delete mark 4367, delete 3522
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 31 buffer(s)
Hash table size 4441, node heap has 29 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 3 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s
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LOG
---
Log sequence number 841353541
Log flushed up to   841353541
Pages flushed up to 841353541
Last checkpoint at  841353532
0 pending log flushes, 0 pending chkp writes
70829 log i/o's done, 0.00 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 339552
Buffer pool size   1002
Free buffers       430
Database pages     504
Old database pages 0
Modified db pages  0
Percent of dirty pages(LRU & free pages): 0.000
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1780790, not young 55036911
0.00 youngs/s, 0.00 non-youngs/s
Pages read 456901, created 1052, written 90798
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
No buffer pool page gets since the last printout
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 504, 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=11628, Main thread ID=9640, state: sleeping
Number of rows inserted 12257, updated 54276, deleted 3547, read 3505141173
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 0
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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