Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2025-01-10 04:22:25 0x1f40 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 53 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 60121 srv_active, 0 srv_shutdown, 4984184 srv_idle
srv_master_thread log flush and writes: 5044305
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 9476634
OS WAIT ARRAY INFO: signal count 2953218
RW-shared spins 0, rounds 5565291, OS waits 818106
RW-excl spins 0, rounds 21903570, OS waits 373987
RW-sx spins 83597, rounds 1140133, OS waits 21456
Spin rounds per wait: 5565291.00 RW-shared, 21903570.00 RW-excl, 13.64 RW-sx
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TRANSACTIONS
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Trx id counter 166908272
Purge done for trx's n:o < 166908272 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283395469287736, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 283395469283520, 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: 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
24476415 OS file reads, 15348305 OS file writes, 5766867 OS fsyncs
0.09 reads/s, 16384 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 395, seg size 397, 2088809 merges
merged operations:
 insert 10899902, delete mark 4760411, delete 3979563
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 1 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s
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LOG
---
Log sequence number 96660497943
Log flushed up to   96660497943
Pages flushed up to 96660497943
Last checkpoint at  96660497934
0 pending log flushes, 0 pending chkp writes
4933143 log i/o's done, 0.00 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 1223424
Buffer pool size   1002
Free buffers       0
Database pages     997
Old database pages 348
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 1600417, not young 821881843
0.00 youngs/s, 0.25 non-youngs/s
Pages read 24475860, created 161890, written 10132576
0.09 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 615 / 1000, young-making rate 0 / 1000 not 1000 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 997, unzip_LRU len: 0
I/O sum[5]: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=9792, Main thread ID=9220, state: sleeping
Number of rows inserted 4324859, updated 179407, deleted 977091, read 755302373
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.13 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 39560
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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