Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Biến | Bể bộ đệm | Trạng thái InnoDB ]

=====================================
2025-12-02 16:23:29 0x7fab0805d700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 34 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 37 srv_active, 0 srv_shutdown, 424 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 569
OS WAIT ARRAY INFO: signal count 504
RW-shared spins 64, rounds 112, OS waits 48
RW-excl spins 227, rounds 1535, OS waits 19
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.75 RW-shared, 6.76 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10265
Purge done for trx's n:o < 10265 undo n:o < 0 state: running but idle
History list length 25
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421847568256464, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421847568255592, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421847568254720, 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
1366 OS file reads, 2658 OS file writes, 869 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 1.18 writes/s, 0.74 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 1 buffer(s)
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 4 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
447.16 hash searches/s, 235.46 non-hash searches/s
---
LOG
---
Log sequence number          52109931
Log buffer assigned up to    52109931
Log buffer completed up to   52109931
Log written up to            52109931
Log flushed up to            52109931
Added dirty pages up to      52109931
Pages flushed up to          52109931
Last checkpoint at           52109931
1299 log i/o's done, 0.40 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 436342
Buffer pool size   8192
Free buffers       6783
Database pages     1387
Old database pages 493
Modified db pages  0
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 44, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1221, created 169, written 1214
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: 1387, unzip_LRU len: 0
I/O sum[18]: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=367, Main thread ID=140372082890496 , state=sleeping
Number of rows inserted 111, updated 1789, deleted 1581, read 492880
1.35 inserts/s, 0.12 updates/s, 0.00 deletes/s, 633.16 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================