Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-02-14 21:15:21 0x7077e44d36c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 59 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 633 srv_active, 0 srv_shutdown, 915235 srv_idle
srv_master_thread log flush and writes: 915846
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17399
OS WAIT ARRAY INFO: signal count 19470
RW-shared spins 15867, rounds 150027, OS waits 2469
RW-excl spins 38223, rounds 222770, OS waits 1375
RW-sx spins 887, rounds 23206, OS waits 431
Spin rounds per wait: 9.46 RW-shared, 5.83 RW-excl, 26.16 RW-sx
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TRANSACTIONS
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Trx id counter 247498
Purge done for trx's n:o < 247498 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 405135237525888, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 405135237521672, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 405135237517456, 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: 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
229831 OS file reads, 47352 OS file writes, 7824 OS fsyncs
1.17 reads/s, 16384 avg bytes/read, 3.22 writes/s, 1.56 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 12, seg size 14, 6585 merges
merged operations:
 insert 27123, delete mark 1099, delete 206
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)
7.49 hash searches/s, 18.93 non-hash searches/s
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LOG
---
Log sequence number 13473189800
Log flushed up to   13473189780
Pages flushed up to 13473179797
Last checkpoint at  13473176003
0 pending log flushes, 0 pending chkp writes
3988 log i/o's done, 1.03 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 90280
Buffer pool size   1003
Free buffers       741
Database pages     256
Old database pages 0
Modified db pages  25
Percent of dirty pages(LRU & free pages): 2.505
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 17956, not young 5378737
0.00 youngs/s, 0.00 non-youngs/s
Pages read 229791, created 966, written 41722
1.17 reads/s, 0.03 creates/s, 1.97 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[109]:cur[3], 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=143780, Main thread ID=123658995484352, state: sleeping
Number of rows inserted 21094, updated 86012, deleted 0, read 58516494
0.00 inserts/s, 0.75 updates/s, 0.00 deletes/s, 7.71 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1600
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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