Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Biến
|
Bể bộ đệm
|
Trạng thái InnoDB
]
=====================================
2025-07-03 06:29:53 0x7fc614196700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 22 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 28 srv_active, 0 srv_shutdown, 816 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 60
OS WAIT ARRAY INFO: signal count 51
RW-shared spins 1, rounds 1, OS waits 0
RW-excl spins 7, rounds 101, OS waits 3
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.00 RW-shared, 14.43 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 9896
Purge done for trx's n:o < 9896 undo n:o < 0 state: running but idle
History list length 18
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421964158073448, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421964158072576, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
1308 OS file reads, 961 OS file writes, 380 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 1.00 writes/s, 0.77 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 0 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 7 buffer(s)
250.17 hash searches/s, 46.09 non-hash searches/s
---
LOG
---
Log sequence number 51033201
Log buffer assigned up to 51033201
Log buffer completed up to 51033201
Log written up to 51033201
Log flushed up to 51033201
Added dirty pages up to 51033201
Pages flushed up to 51033201
Last checkpoint at 51033201
256 log i/o's done, 0.36 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 650783
Buffer pool size 8192
Free buffers 6830
Database pages 1345
Old database pages 516
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1191, created 154, written 595
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 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: 1345, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=371, Main thread ID=140488745039616 , state=sleeping
Number of rows inserted 60, updated 400, deleted 23, read 610468
0.05 inserts/s, 0.09 updates/s, 0.00 deletes/s, 448.80 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
