Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variable
|
Bufferpool
|
InnoDB status
]
=====================================
2024-09-19 23:37:48 0x7f5be0d3e700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 46 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 43 srv_active, 0 srv_shutdown, 377 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 127
OS WAIT ARRAY INFO: signal count 114
RW-shared spins 2, rounds 3, OS waits 1
RW-excl spins 7, rounds 210, OS waits 7
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 1.50 RW-shared, 30.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10099
Purge done for trx's n:o < 10095 undo n:o < 0 state: running but idle
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421508151949928, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421508151949056, 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
1516 OS file reads, 1737 OS file writes, 641 OS fsyncs
0.09 reads/s, 12544 avg bytes/read, 2.61 writes/s, 1.28 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 2 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 7 buffer(s)
804.27 hash searches/s, 452.29 non-hash searches/s
---
LOG
---
Log sequence number 51095011
Log buffer assigned up to 51095011
Log buffer completed up to 51095011
Log written up to 51095011
Log flushed up to 51095011
Added dirty pages up to 51095011
Pages flushed up to 51095011
Last checkpoint at 51095011
490 log i/o's done, 0.80 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 664182
Buffer pool size 8192
Free buffers 6615
Database pages 1558
Old database pages 555
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 373, not young 188
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1389, created 175, written 1091
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: 1558, unzip_LRU len: 0
I/O sum[73]: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=369, Main thread ID=140032665925376 , state=sleeping
Number of rows inserted 244, updated 491, deleted 0, read 915184
0.43 inserts/s, 0.28 updates/s, 0.00 deletes/s, 1595.40 reads/s
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END OF INNODB MONITOR OUTPUT
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