Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
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Trạng thái InnoDB
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2024-09-20 00:16:06 0x7f2ef2795700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 19 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 9 srv_active, 0 srv_shutdown, 9 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17
OS WAIT ARRAY INFO: signal count 17
RW-shared spins 0, rounds 0, OS waits 0
RW-excl spins 0, rounds 0, OS waits 0
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 RW-shared, 0.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 9860
Purge done for trx's n:o < 9859 undo n:o < 0 state: running but idle
History list length 88
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421316078647912, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421316078650528, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421316078648784, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421316078647040, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
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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
1394 OS file reads, 393 OS file writes, 142 OS fsyncs
69.70 reads/s, 19699 avg bytes/read, 19.65 writes/s, 7.10 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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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 2 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
3928.58 hash searches/s, 2205.83 non-hash searches/s
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LOG
---
Log sequence number 50969176
Log buffer assigned up to 50969176
Log buffer completed up to 50969176
Log written up to 50969176
Log flushed up to 50969176
Added dirty pages up to 50969176
Pages flushed up to 50956828
Last checkpoint at 50956828
141 log i/o's done, 7.42 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 137363456
Dictionary memory allocated 648732
Buffer pool size 8192
Free buffers 6777
Database pages 1401
Old database pages 531
Modified db pages 63
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 152, not young 848
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1257, created 153, written 207
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 995 / 1000, young-making rate 0 / 1000 not 3 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1401, unzip_LRU len: 0
I/O sum[253]:cur[4], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=369, Main thread ID=139840591968000 , state=sleeping
Number of rows inserted 119, updated 355, deleted 0, read 122210
6.26 inserts/s, 18.68 updates/s, 0.00 deletes/s, 6431.77 reads/s
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END OF INNODB MONITOR OUTPUT
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