Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variables
|
Buffer Pool
|
InnoDB Status
]
=====================================
2024-05-20 12:36:31 0x7f48901aa700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 38 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 65 srv_active, 0 srv_shutdown, 276 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 85
OS WAIT ARRAY INFO: signal count 83
RW-shared spins 4, rounds 7, OS waits 3
RW-excl spins 9, rounds 270, OS waits 9
RW-sx spins 1, rounds 5, OS waits 0
Spin rounds per wait: 1.75 RW-shared, 30.00 RW-excl, 5.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10126
Purge done for trx's n:o < 10126 undo n:o < 0 state: running but idle
History list length 51
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421424773425768, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421424773424896, 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
1333 OS file reads, 2140 OS file writes, 827 OS fsyncs
0.03 reads/s, 16384 avg bytes/read, 0.89 writes/s, 0.37 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 0 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 4 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
474.41 hash searches/s, 91.89 non-hash searches/s
---
LOG
---
Log sequence number 51387465
Log buffer assigned up to 51387465
Log buffer completed up to 51387465
Log written up to 51387465
Log flushed up to 51387465
Added dirty pages up to 51387465
Pages flushed up to 51387465
Last checkpoint at 51387465
764 log i/o's done, 0.16 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 740024
Buffer pool size 8192
Free buffers 6730
Database pages 1447
Old database pages 514
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 692, not young 690
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1222, created 306, written 1150
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: 1447, unzip_LRU len: 0
I/O sum[19]: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=376, Main thread ID=139949288654592 , state=sleeping
Number of rows inserted 1861, updated 875, deleted 1, read 633699
4.74 inserts/s, 0.08 updates/s, 0.00 deletes/s, 1927.95 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
