Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Biến | Bể bộ đệm | Trạng thái InnoDB ]

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2025-02-02 18:07:32 0x7f04a4486640 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 44 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 9334 srv_active, 0 srv_shutdown, 707840 srv_idle
srv_master_thread log flush and writes: 717035
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 139196
OS WAIT ARRAY INFO: signal count 85087
RW-shared spins 20606, rounds 433816, OS waits 13970
RW-excl spins 56, rounds 433, OS waits 4
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 21.05 RW-shared, 7.73 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 1439363
Purge done for trx's n:o < 1439363 undo n:o < 0 state: running but idle
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421132897915144, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421132897910928, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
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I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
167149 OS file reads, 83493 OS file writes, 63118 OS fsyncs
0.02 reads/s, 16384 avg bytes/read, 0.27 writes/s, 0.20 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 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.25 hash searches/s, 0.61 non-hash searches/s
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LOG
---
Log sequence number 549222015
Log flushed up to   549222015
Pages flushed up to 549222015
Last checkpoint at  549222006
0 pending log flushes, 0 pending chkp writes
40126 log i/o's done, 0.14 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 33554432
Dictionary memory allocated 993080
Buffer pool size   1003
Free buffers       741
Database pages     256
Old database pages 0
Modified db pages  0
Percent of dirty pages(LRU & free pages): 0.000
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 7186, not young 653097
0.00 youngs/s, 0.00 non-youngs/s
Pages read 166740, created 464, written 35209
0.02 reads/s, 0.02 creates/s, 0.11 writes/s
Buffer pool hit rate 985 / 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: 256, unzip_LRU len: 0
I/O sum[15]:cur[0], 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=805297, Main thread ID=139656834315840, state: sleeping
Number of rows inserted 37, updated 6720, deleted 30, read 6315940
0.00 inserts/s, 0.02 updates/s, 0.00 deletes/s, 0.25 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 59858
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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