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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2025-04-17 00:46:31 0x11d0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 47 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 20392 srv_active, 0 srv_shutdown, 982597 srv_idle
srv_master_thread log flush and writes: 1002989
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 893409
OS WAIT ARRAY INFO: signal count 389238
RW-shared spins 41133, rounds 1188787, OS waits 39224
RW-excl spins 7100, rounds 70164, OS waits 672
RW-sx spins 90, rounds 2502, OS waits 63
Spin rounds per wait: 28.90 RW-shared, 9.88 RW-excl, 27.80 RW-sx
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TRANSACTIONS
------------
Trx id counter 70015
Purge done for trx's n:o < 70015 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 281475183637056, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183632888, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183624552, not started
mysql tables in use 1, locked 0
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183612048, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183628720, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183620384, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 281475183616216, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (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
165857 OS file reads, 308267 OS file writes, 208878 OS fsyncs
0.06 reads/s, 16384 avg bytes/read, 0.36 writes/s, 0.32 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 14 merges
merged operations:
 insert 24, delete mark 9, delete 2
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 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)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
1.70 hash searches/s, 2.30 non-hash searches/s
---
LOG
---
Log sequence number 58877853
Log flushed up to   58877853
Pages flushed up to 58877628
Last checkpoint at  58876251
0 pending log flushes, 0 pending chkp writes
132206 log i/o's done, 0.19 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 220352
Buffer pool size   1003
Free buffers       738
Database pages     257
Old database pages 0
Modified db pages  3
Percent of dirty pages(LRU & free pages): 0.301
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 97, not young 877
0.00 youngs/s, 0.00 non-youngs/s
Pages read 165765, created 2001, written 148879
0.12 reads/s, 0.00 creates/s, 0.23 writes/s
Buffer pool hit rate 989 / 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: 257, unzip_LRU len: 0
I/O sum[5]: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=3428, Main thread ID=4536, state: sleeping
Number of rows inserted 3990, updated 23629, deleted 4263, read 3413678
0.00 inserts/s, 0.06 updates/s, 0.00 deletes/s, 1.68 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 10609
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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