Storage engines

InnoDB

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

[ Variables | Reserva de búfers | Estado del InnoDB ]

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2026-09-26 15:55:39 0x1404 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 2 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 17650 srv_active, 0 srv_shutdown, 1544777 srv_idle
srv_master_thread log flush and writes: 1562427
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 219618
OS WAIT ARRAY INFO: signal count 30373
RW-shared spins 5014, rounds 146891, OS waits 4803
RW-excl spins 979, rounds 19792, OS waits 555
RW-sx spins 15, rounds 436, OS waits 12
Spin rounds per wait: 29.30 RW-shared, 20.22 RW-excl, 29.07 RW-sx
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TRANSACTIONS
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Trx id counter 212830
Purge done for trx's n:o < 212830 undo n:o < 0 state: running but idle
History list length 2
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283748288954680, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283748288950504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283748288946328, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
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
150774 OS file reads, 240626 OS file writes, 132608 OS fsyncs
15.99 reads/s, 16384 avg bytes/read, 6.50 writes/s, 5.50 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, 259 merges
merged operations:
 insert 253, delete mark 6, delete 0
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 1 buffer(s)
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 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
7.50 hash searches/s, 67.97 non-hash searches/s
---
LOG
---
Log sequence number 95188729
Log flushed up to   95188709
Pages flushed up to 95158655
Last checkpoint at  95154984
0 pending log flushes, 0 pending chkp writes
65073 log i/o's done, 3.50 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 851360
Buffer pool size   1003
Free buffers       730
Database pages     265
Old database pages 0
Modified db pages  55
Percent of dirty pages(LRU & free pages): 5.522
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1592, not young 43131
0.00 youngs/s, 0.00 non-youngs/s
Pages read 150428, created 1837, written 148585
15.99 reads/s, 1.00 creates/s, 2.00 writes/s
Buffer pool hit rate 929 / 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: 265, unzip_LRU len: 0
I/O sum[80]: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=3288, Main thread ID=8188, state: sleeping
Number of rows inserted 306, updated 36977, deleted 85, read 7838721
0.00 inserts/s, 2.50 updates/s, 0.00 deletes/s, 59.47 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 287664
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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