Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variable
|
Bufferpool
|
InnoDB status
]
=====================================
2024-09-19 18:37:36 0x7fa85c0e9700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 27 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 67 srv_active, 0 srv_shutdown, 325 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 240
OS WAIT ARRAY INFO: signal count 240
RW-shared spins 26, rounds 49, OS waits 23
RW-excl spins 13, rounds 220, OS waits 7
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.88 RW-shared, 16.92 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10496
Purge done for trx's n:o < 10494 undo n:o < 0 state: running but idle
History list length 41
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421836517015864, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421836517014120, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421836517013248, 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
1387 OS file reads, 3498 OS file writes, 1347 OS fsyncs
1.15 reads/s, 16384 avg bytes/read, 5.00 writes/s, 2.26 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 1 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
2030.55 hash searches/s, 406.73 non-hash searches/s
---
LOG
---
Log sequence number 51827602
Log buffer assigned up to 51827602
Log buffer completed up to 51827602
Log written up to 51827602
Log flushed up to 51827602
Added dirty pages up to 51827602
Pages flushed up to 51827602
Last checkpoint at 51827602
1389 log i/o's done, 2.07 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 944972
Buffer pool size 8192
Free buffers 6613
Database pages 1562
Old database pages 569
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 1143, not young 2545
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1264, created 334, written 1833
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 1 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1562, unzip_LRU len: 0
I/O sum[132]: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=368, Main thread ID=140361100871424 , state=sleeping
Number of rows inserted 1307, updated 995, deleted 358, read 802011
1.74 inserts/s, 0.93 updates/s, 0.00 deletes/s, 2447.02 reads/s
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END OF INNODB MONITOR OUTPUT
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