Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2026-10-01 03:08:22 0x2adc INNODB MONITOR OUTPUT
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Per second averages calculated from the last 37 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 19729 srv_active, 0 srv_shutdown, 1861863 srv_idle
srv_master_thread log flush and writes: 1881592
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 76273
OS WAIT ARRAY INFO: signal count 21538
RW-shared spins 16815, rounds 392399, OS waits 12327
RW-excl spins 9231, rounds 102613, OS waits 1467
RW-sx spins 859, rounds 16476, OS waits 207
Spin rounds per wait: 23.34 RW-shared, 11.12 RW-excl, 19.18 RW-sx
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TRANSACTIONS
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Trx id counter 147588
Purge done for trx's n:o < 147588 undo n:o < 0 state: running but idle
History list length 5
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283519618486488, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283519618482320, 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: 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
40389 OS file reads, 91699 OS file writes, 58452 OS fsyncs
0.19 reads/s, 16384 avg bytes/read, 0.68 writes/s, 0.46 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 9, seg size 11, 708 merges
merged operations:
 insert 692, delete mark 612, 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 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)
1.24 hash searches/s, 5.35 non-hash searches/s
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LOG
---
Log sequence number 70510908
Log flushed up to   70510908
Pages flushed up to 70510908
Last checkpoint at  70507639
0 pending log flushes, 0 pending chkp writes
35845 log i/o's done, 0.30 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 157752
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 40323, created 458, written 48826
0.19 reads/s, 0.00 creates/s, 0.32 writes/s
Buffer pool hit rate 981 / 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[9]:cur[10], 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=4048, Main thread ID=4796, state: sleeping
Number of rows inserted 2835, updated 2059, deleted 5894, read 16353072
0.00 inserts/s, 0.14 updates/s, 0.00 deletes/s, 5.73 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 2461
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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