Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

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2026-08-13 21:47:26 0x7916f86b86c0 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 54 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 351 srv_active, 0 srv_shutdown, 227721 srv_idle
srv_master_thread log flush and writes: 228061
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 8855
OS WAIT ARRAY INFO: signal count 9543
RW-shared spins 7075, rounds 86524, OS waits 1483
RW-excl spins 18500, rounds 118538, OS waits 755
RW-sx spins 145, rounds 4251, OS waits 88
Spin rounds per wait: 12.23 RW-shared, 6.41 RW-excl, 29.32 RW-sx
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TRANSACTIONS
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Trx id counter 426298
Purge done for trx's n:o < 426298 undo n:o < 0 state: running
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 414614482006400, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414614482002184, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414614481997968, 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: 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: 1; buffer pool: 0
117083 OS file reads, 21465 OS file writes, 4031 OS fsyncs
1.52 reads/s, 16384 avg bytes/read, 5.50 writes/s, 2.33 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, 3027 merges
merged operations:
 insert 12175, delete mark 8, 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 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
6.87 hash searches/s, 18.85 non-hash searches/s
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LOG
---
Log sequence number 14105560241
Log flushed up to   14105560221
Pages flushed up to 14105554312
Last checkpoint at  14105540822
1 pending log flushes, 0 pending chkp writes
2147 log i/o's done, 1.52 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 92720
Buffer pool size   1003
Free buffers       740
Database pages     256
Old database pages 0
Modified db pages  11
Percent of dirty pages(LRU & free pages): 1.103
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 11306, not young 4485751
0.00 youngs/s, 0.00 non-youngs/s
Pages read 117042, created 520, written 18541
1.52 reads/s, 0.02 creates/s, 3.65 writes/s
Buffer pool hit rate 976 / 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[206]:cur[4], 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=795058, Main thread ID=133138642609856, state: flushing log
Number of rows inserted 8770, updated 36501, deleted 0, read 25088209
0.00 inserts/s, 1.26 updates/s, 0.00 deletes/s, 6.83 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 3363
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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