Motores de almacenamiento
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variables
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Reserva de búfers
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Estado del InnoDB
]
=====================================
2026-08-24 20:30:04 0xa20 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 30 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 8431 srv_active, 0 srv_shutdown, 25370 srv_idle
srv_master_thread log flush and writes: 33801
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 74390
--Thread 5368 has waited at srv0srv.cc line 900 for 0.00 seconds the semaphore:
Mutex at 00007FF6246E0C50, Mutex SRV_SYS created srv0srv.cc:1005, lock var 2
--Thread 5372 has waited at srv0srv.cc line 900 for 0.00 seconds the semaphore:
Mutex at 00007FF6246E0C50, Mutex SRV_SYS created srv0srv.cc:1005, lock var 2
OS WAIT ARRAY INFO: signal count 15734
RW-shared spins 3116, rounds 90345, OS waits 2855
RW-excl spins 425, rounds 4194, OS waits 98
RW-sx spins 1, rounds 30, OS waits 0
Spin rounds per wait: 28.99 RW-shared, 9.87 RW-excl, 30.00 RW-sx
------------------------
LATEST FOREIGN KEY ERROR
------------------------
2026-08-24 15:27:26 0x36a0 Error in foreign key constraint creation for table `restobar_db`.`#sql-11c0_ad`.
A foreign key constraint of name `restobar_db`.`fk_orders_client`
already exists. (Note that internally InnoDB adds 'databasename'
in front of the user-defined constraint name.)
Note that InnoDB's FOREIGN KEY system tables store
constraint names as case-insensitive, with the
MySQL standard latin1_swedish_ci collation. If you
create tables or databases whose names differ only in
the character case, then collisions in constraint
names can occur. Workaround: name your constraints
explicitly with unique names.
------------
TRANSACTIONS
------------
Trx id counter 152546
Purge done for trx's n:o < 152546 undo n:o < 0 state: running
History list length 17
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284283541946512, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284283541963184, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284283541959016, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284283541954848, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284283541975688, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
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
30270 OS file reads, 97661 OS file writes, 55763 OS fsyncs
2.70 reads/s, 16384 avg bytes/read, 9.00 writes/s, 4.10 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 167 merges
merged operations:
insert 155, delete mark 14, 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 2 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 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)
11.07 hash searches/s, 25.47 non-hash searches/s
---
LOG
---
Log sequence number 42294529
Log flushed up to 42294509
Pages flushed up to 42277370
Last checkpoint at 42277370
0 pending log flushes, 0 pending chkp writes
27826 log i/o's done, 2.77 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 150240
Buffer pool size 1003
Free buffers 733
Database pages 262
Old database pages 0
Modified db pages 29
Percent of dirty pages(LRU & free pages): 2.912
Max dirty pages percent: 75.000
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 30213, created 717, written 60002
2.70 reads/s, 0.07 creates/s, 5.77 writes/s
Buffer pool hit rate 968 / 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: 262, unzip_LRU len: 0
I/O sum[244]:cur[10], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=3952, Main thread ID=5360, state: sleeping
Number of rows inserted 439, updated 13104, deleted 16, read 2623085
0.00 inserts/s, 1.80 updates/s, 0.00 deletes/s, 10.83 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 25775
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
