Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variable
|
Bufferpool
|
InnoDB status
]
=====================================
2024-09-19 17:54:34 0x7fbf3ee51700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 34 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 72 srv_active, 0 srv_shutdown, 452 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 412
OS WAIT ARRAY INFO: signal count 348
RW-shared spins 42, rounds 78, OS waits 36
RW-excl spins 43, rounds 732, OS waits 17
RW-sx spins 1, rounds 14, OS waits 0
Spin rounds per wait: 1.86 RW-shared, 17.02 RW-excl, 14.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10579
Purge done for trx's n:o < 10578 undo n:o < 0 state: running but idle
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421935682882152, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421935682881280, 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
1566 OS file reads, 4097 OS file writes, 1467 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.41 writes/s, 0.32 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 1 buffer(s)
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 2 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
1377.46 hash searches/s, 391.08 non-hash searches/s
---
LOG
---
Log sequence number 51939512
Log buffer assigned up to 51939512
Log buffer completed up to 51939512
Log written up to 51939512
Log flushed up to 51939512
Added dirty pages up to 51939512
Pages flushed up to 51939512
Last checkpoint at 51939512
1553 log i/o's done, 0.11 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 704536
Buffer pool size 8192
Free buffers 6476
Database pages 1700
Old database pages 615
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 680, not young 1922
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1413, created 335, written 2246
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: 1700, unzip_LRU len: 0
I/O sum[255]: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=370, Main thread ID=140460196828928 , state=sleeping
Number of rows inserted 1420, updated 994, deleted 544, read 861637
0.03 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1533.87 reads/s
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END OF INNODB MONITOR OUTPUT
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