Storage engines

InnoDB

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

[ متغيرات | Buffer Pool | وضع InnoDB ]

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2026-11-16 00:48:07 0x6450 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 21 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 459 srv_active, 0 srv_shutdown, 65235 srv_idle
srv_master_thread log flush and writes: 65694
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 235
OS WAIT ARRAY INFO: signal count 214
RW-shared spins 132, rounds 3933, OS waits 130
RW-excl spins 30, rounds 143, OS waits 3
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.80 RW-shared, 4.77 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 1234751
Purge done for trx's n:o < 1234751 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284244177563864, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284244177559696, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284244177576368, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284244177568032, 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
7000 OS file reads, 7574 OS file writes, 3978 OS fsyncs
9.81 reads/s, 16384 avg bytes/read, 14.81 writes/s, 7.24 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, 5 merges
merged operations:
 insert 4, delete mark 1, 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 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 1 buffer(s)
16.48 hash searches/s, 42.05 non-hash searches/s
---
LOG
---
Log sequence number 574198607
Log flushed up to   574198587
Pages flushed up to 574180635
Last checkpoint at  574095205
0 pending log flushes, 0 pending chkp writes
2336 log i/o's done, 4.62 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 741184
Buffer pool size   1003
Free buffers       734
Database pages     263
Old database pages 0
Modified db pages  43
Percent of dirty pages(LRU & free pages): 4.309
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 129, not young 4343
0.00 youngs/s, 0.00 non-youngs/s
Pages read 6701, created 209, written 4504
9.81 reads/s, 0.19 creates/s, 8.90 writes/s
Buffer pool hit rate 944 / 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: 263, unzip_LRU len: 0
I/O sum[1311]:cur[14], 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=4664, Main thread ID=7376, state: sleeping
Number of rows inserted 12, updated 1537, deleted 0, read 87126
0.00 inserts/s, 3.43 updates/s, 0.00 deletes/s, 31.90 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 10454
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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