Μηχανές αποθήκευσης

InnoDB

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

[ Μεταβλητές | Buffer Pool | Κατάσταση InnoDB ]

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2026-08-04 17:14:25 0x17dc 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: 8068 srv_active, 0 srv_shutdown, 75002 srv_idle
srv_master_thread log flush and writes: 83070
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 137639
OS WAIT ARRAY INFO: signal count 12827
RW-shared spins 2599, rounds 77670, OS waits 2307
RW-excl spins 86, rounds 2626, OS waits 78
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 29.88 RW-shared, 30.53 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 29662
Purge done for trx's n:o < 29662 undo n:o < 0 state: running
History list length 2
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284270503305504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503297168, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284270503301336, 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: 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
25644 OS file reads, 87905 OS file writes, 49966 OS fsyncs
1.93 reads/s, 16384 avg bytes/read, 4.50 writes/s, 2.39 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 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)
8.28 hash searches/s, 21.76 non-hash searches/s
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LOG
---
Log sequence number 16984335
Log flushed up to   16980509
Pages flushed up to 16972684
Last checkpoint at  16972675
0 pending log flushes, 0 pending chkp writes
25067 log i/o's done, 1.57 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 105168
Buffer pool size   1003
Free buffers       717
Database pages     280
Old database pages 0
Modified db pages  158
Percent of dirty pages(LRU & free pages): 15.832
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 25596, created 575, written 54045
1.93 reads/s, 0.11 creates/s, 2.52 writes/s
Buffer pool hit rate 972 / 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: 280, unzip_LRU len: 0
I/O sum[193]:cur[25], 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=3156, Main thread ID=3344, state: sleeping
Number of rows inserted 78, updated 11972, deleted 0, read 21968042
0.00 inserts/s, 1.33 updates/s, 0.00 deletes/s, 59.13 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 14268
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 8.33 reads/s
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END OF INNODB MONITOR OUTPUT
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