Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-06-01 17:30:26 0x7d34929696c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 18 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 38994 srv_active, 0 srv_shutdown, 4744870 srv_idle
srv_master_thread log flush and writes: 4783724
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 109581
OS WAIT ARRAY INFO: signal count 43374
RW-shared spins 0, rounds 23267, OS waits 11502
RW-excl spins 0, rounds 10042, OS waits 257
RW-sx spins 5, rounds 125, OS waits 4
Spin rounds per wait: 23267.00 RW-shared, 10042.00 RW-excl, 25.00 RW-sx
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TRANSACTIONS
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Trx id counter 461058
Purge done for trx's n:o < 461058 undo n:o < 0 state: running but idle
History list length 13
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 419139476046328, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 419139476042072, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 419139476037816, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
--------
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
118890 OS file reads, 416500 OS file writes, 239441 OS fsyncs
10.78 reads/s, 16384 avg bytes/read, 26.78 writes/s, 12.05 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 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)
26.89 hash searches/s, 71.33 non-hash searches/s
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LOG
---
Log sequence number 126987619
Log flushed up to   126987599
Pages flushed up to 126970638
Last checkpoint at  126969794
0 pending log flushes, 0 pending chkp writes
120055 log i/o's done, 6.89 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 347360
Buffer pool size   1001
Free buffers       734
Database pages     259
Old database pages 0
Modified db pages  37
Percent of dirty pages(LRU & free pages): 3.722
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 248, not young 144
0.00 youngs/s, 0.00 non-youngs/s
Pages read 118634, created 2806, written 255909
10.78 reads/s, 0.39 creates/s, 17.78 writes/s
Buffer pool hit rate 961 / 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: 259, unzip_LRU len: 0
I/O sum[1455]:cur[1], 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=3081, Main thread ID=137663835272896, state: sleeping
Number of rows inserted 437, updated 55413, deleted 189, read 9438044
0.00 inserts/s, 5.50 updates/s, 0.00 deletes/s, 63.94 reads/s
Number of system rows inserted 6, updated 0, deleted 0, read 242750
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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