Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-04-21 20:59:12 0xa5f8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 45 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 496 srv_active, 0 srv_shutdown, 465230 srv_idle
srv_master_thread log flush and writes: 465726
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 2106
OS WAIT ARRAY INFO: signal count 1420
RW-shared spins 1049, rounds 29902, OS waits 981
RW-excl spins 375, rounds 1357, OS waits 5
RW-sx spins 5, rounds 112, OS waits 3
Spin rounds per wait: 28.51 RW-shared, 3.62 RW-excl, 22.40 RW-sx
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TRANSACTIONS
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Trx id counter 31016
Purge done for trx's n:o < 31016 undo n:o < 0 state: running but idle
History list length 8
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283623508902176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508898008, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508893840, 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
3200 OS file reads, 8920 OS file writes, 5140 OS fsyncs
1.51 reads/s, 16384 avg bytes/read, 4.44 writes/s, 2.16 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 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)
Hash table size 4441, node heap has 1 buffer(s)
7.11 hash searches/s, 20.56 non-hash searches/s
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LOG
---
Log sequence number 27255079
Log flushed up to   27255059
Pages flushed up to 27252523
Last checkpoint at  27226168
0 pending log flushes, 0 pending chkp writes
3263 log i/o's done, 1.36 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 150240
Buffer pool size   1003
Free buffers       739
Database pages     258
Old database pages 0
Modified db pages  5
Percent of dirty pages(LRU & free pages): 0.501
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 3136, created 206, written 5029
1.51 reads/s, 0.02 creates/s, 2.80 writes/s
Buffer pool hit rate 975 / 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: 258, unzip_LRU len: 0
I/O sum[192]:cur[2], 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=12824, Main thread ID=11168, state: sleeping
Number of rows inserted 141, updated 573, deleted 92, read 238485
0.00 inserts/s, 0.80 updates/s, 0.00 deletes/s, 8.62 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1220
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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