Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variables
|
Reserva de búfers
|
Estado del InnoDB
]
=====================================
2026-09-26 16:47:39 0x2a60 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 6 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 17967 srv_active, 0 srv_shutdown, 1547575 srv_idle
srv_master_thread log flush and writes: 1565542
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 229465
OS WAIT ARRAY INFO: signal count 31316
RW-shared spins 5160, rounds 151271, OS waits 4946
RW-excl spins 989, rounds 20092, OS waits 564
RW-sx spins 16, rounds 466, OS waits 13
Spin rounds per wait: 29.32 RW-shared, 20.32 RW-excl, 29.13 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 215541
Purge done for trx's n:o < 215541 undo n:o < 0 state: running but idle
History list length 11
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)
--------
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
154881 OS file reads, 246825 OS file writes, 135789 OS fsyncs
1.67 reads/s, 16384 avg bytes/read, 8.17 writes/s, 5.83 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
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 2 buffer(s)
3.67 hash searches/s, 12.16 non-hash searches/s
---
LOG
---
Log sequence number 96933343
Log flushed up to 96933343
Pages flushed up to 96933343
Last checkpoint at 96930861
0 pending log flushes, 0 pending chkp writes
67046 log i/o's done, 2.83 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 851360
Buffer pool size 1003
Free buffers 738
Database pages 256
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 1599, not young 45712
0.00 youngs/s, 0.00 non-youngs/s
Pages read 154535, created 1909, written 152267
1.67 reads/s, 0.00 creates/s, 4.33 writes/s
Buffer pool hit rate 955 / 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: 256, unzip_LRU len: 0
I/O sum[124]:cur[6], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
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 38332, deleted 85, read 7917394
0.00 inserts/s, 1.50 updates/s, 0.00 deletes/s, 3.33 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 301386
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
