Opslag-engines

InnoDB

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

[ Variabelen | Buffer Pool | InnoDB-status ]

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2026-11-14 23:24:35 0x27a8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 46 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 1282 srv_active, 0 srv_shutdown, 81217 srv_idle
srv_master_thread log flush and writes: 82499
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 31258
OS WAIT ARRAY INFO: signal count 1423
RW-shared spins 534, rounds 15967, OS waits 468
RW-excl spins 5, rounds 150, OS waits 4
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.90 RW-shared, 30.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 4628
Purge done for trx's n:o < 4628 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282926895542488, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282926895538320, 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
3747 OS file reads, 15235 OS file writes, 8854 OS fsyncs
1.17 reads/s, 16384 avg bytes/read, 7.93 writes/s, 4.35 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 0 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 0 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)
13.20 hash searches/s, 43.59 non-hash searches/s
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LOG
---
Log sequence number 3164944
Log flushed up to   3164944
Pages flushed up to 3164944
Last checkpoint at  3164935
0 pending log flushes, 0 pending chkp writes
4698 log i/o's done, 2.54 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 80128
Buffer pool size   1003
Free buffers       741
Database pages     260
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 3711, created 197, written 8895
1.17 reads/s, 0.00 creates/s, 4.70 writes/s
Buffer pool hit rate 990 / 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: 260, unzip_LRU len: 0
I/O sum[304]:cur[0], 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=6772, Main thread ID=1780, state: sleeping
Number of rows inserted 0, updated 2194, deleted 0, read 24268
0.00 inserts/s, 0.91 updates/s, 0.00 deletes/s, 12.17 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 2327
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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