Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Biến | Bể bộ đệm | Trạng thái InnoDB ]

=====================================
2025-12-04 21:16:37 0x7f0bbc0be700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 61 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 5784 srv_active, 0 srv_shutdown, 8512 srv_idle
srv_master_thread log flush and writes: 14294
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 18325
OS WAIT ARRAY INFO: signal count 14873
RW-shared spins 0, rounds 9771, OS waits 4868
RW-excl spins 0, rounds 1981, OS waits 67
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 9771.00 RW-shared, 1981.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 58816
Purge done for trx's n:o < 58816 undo n:o < 0 state: running
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421163135218168, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421163135213912, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421163135209656, 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
863 OS file reads, 77834 OS file writes, 43426 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 3.93 writes/s, 1.54 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 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 9 buffer(s)
Hash table size 69257, node heap has 2 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 3 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
1.62 hash searches/s, 0.56 non-hash searches/s
---
LOG
---
Log sequence number 23735104
Log flushed up to   23735104
Pages flushed up to 23735104
Last checkpoint at  23735095
0 pending log flushes, 0 pending chkp writes
26305 log i/o's done, 1.11 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 128256
Buffer pool size   16024
Free buffers       15108
Database pages     850
Old database pages 333
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 704, created 146, written 45259
0.00 reads/s, 0.00 creates/s, 2.66 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: 850, 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=905, Main thread ID=139687662397184, state: sleeping
Number of rows inserted 2, updated 10516, deleted 0, read 1159420
0.00 inserts/s, 0.48 updates/s, 0.00 deletes/s, 0.93 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 8487
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================