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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2026-11-13 03:51:42 0x123c INNODB MONITOR OUTPUT
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Per second averages calculated from the last 55 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 645899 srv_active, 0 srv_shutdown, 1107725 srv_idle
srv_master_thread log flush and writes: 1753624
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 24238404
OS WAIT ARRAY INFO: signal count 3093126
RW-shared spins 455255, rounds 13588911, OS waits 451135
RW-excl spins 10552, rounds 273154, OS waits 8606
RW-sx spins 306, rounds 9237, OS waits 263
Spin rounds per wait: 29.85 RW-shared, 25.89 RW-excl, 30.19 RW-sx
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TRANSACTIONS
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Trx id counter 2337399
Purge done for trx's n:o < 2337399 undo n:o < 0 state: running but idle
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283227723141432, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283227723137256, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283227723153960, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283227723149784, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283227723145608, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283227723133080, 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
6139844 OS file reads, 7773909 OS file writes, 4904842 OS fsyncs
22.18 reads/s, 16384 avg bytes/read, 28.45 writes/s, 12.65 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, 680 merges
merged operations:
 insert 731, delete mark 51, delete 7
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 2 buffer(s)
30.64 hash searches/s, 78.03 non-hash searches/s
---
LOG
---
Log sequence number 1370039204
Log flushed up to   1370039204
Pages flushed up to 1370035567
Last checkpoint at  1370028723
0 pending log flushes, 0 pending chkp writes
2571744 log i/o's done, 7.71 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 851360
Buffer pool size   1003
Free buffers       705
Database pages     289
Old database pages 0
Modified db pages  7
Percent of dirty pages(LRU & free pages): 0.704
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 839, not young 21315
0.00 youngs/s, 0.00 non-youngs/s
Pages read 6139500, created 51403, written 4314466
22.88 reads/s, 0.24 creates/s, 19.04 writes/s
Buffer pool hit rate 971 / 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: 289, unzip_LRU len: 0
I/O sum[2097]: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=8480, Main thread ID=9588, state: sleeping
Number of rows inserted 277, updated 981172, deleted 0, read 15074867065
0.00 inserts/s, 5.73 updates/s, 0.00 deletes/s, 3830.13 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 98166
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 6.42 reads/s
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END OF INNODB MONITOR OUTPUT
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