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 15:12:24 0x1bd4 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 18 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 17501 srv_active, 0 srv_shutdown, 1542335 srv_idle
srv_master_thread log flush and writes: 1559836
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 215990
OS WAIT ARRAY INFO: signal count 30008
RW-shared spins 4987, rounds 146081, OS waits 4776
RW-excl spins 972, rounds 19582, OS waits 549
RW-sx spins 15, rounds 436, OS waits 12
Spin rounds per wait: 29.29 RW-shared, 20.15 RW-excl, 29.07 RW-sx
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TRANSACTIONS
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Trx id counter 211572
Purge done for trx's n:o < 211572 undo n:o < 0 state: running but idle
History list length 14
LIST OF TRANSACTIONS FOR EACH SESSION:
---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
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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
149359 OS file reads, 237327 OS file writes, 131052 OS fsyncs
8.78 reads/s, 16384 avg bytes/read, 22.94 writes/s, 9.67 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)
9.22 hash searches/s, 36.16 non-hash searches/s
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LOG
---
Log sequence number 94382613
Log flushed up to   94382577
Pages flushed up to 94380020
Last checkpoint at  94356818
0 pending log flushes, 0 pending chkp writes
64206 log i/o's done, 5.17 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       737
Database pages     258
Old database pages 0
Modified db pages  5
Percent of dirty pages(LRU & free pages): 0.502
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 149013, created 1798, written 146457
8.78 reads/s, 0.17 creates/s, 15.78 writes/s
Buffer pool hit rate 960 / 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: 258, unzip_LRU len: 0
I/O sum[1006]:cur[23], 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 36348, deleted 85, read 7829690
0.00 inserts/s, 3.89 updates/s, 0.00 deletes/s, 13.50 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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