Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2025-07-13 12:36:51 0x2b58 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 6 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 7102 srv_active, 0 srv_shutdown, 326785 srv_idle
srv_master_thread log flush and writes: 333887
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 217458
OS WAIT ARRAY INFO: signal count 39764
RW-shared spins 0, rounds 52096, OS waits 21924
RW-excl spins 0, rounds 140879, OS waits 2215
RW-sx spins 972, rounds 14156, OS waits 196
Spin rounds per wait: 52096.00 RW-shared, 140879.00 RW-excl, 14.56 RW-sx
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TRANSACTIONS
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Trx id counter 3805255
Purge done for trx's n:o < 3805255 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282943159542072, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 282943159537856, not started
0 lock struct(s), heap size 1136, 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
417737 OS file reads, 144784 OS file writes, 91426 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 23, seg size 25, 1318 merges
merged operations:
 insert 8970, delete mark 3053, delete 2626
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 3 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 2 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)
0.00 hash searches/s, 0.00 non-hash searches/s
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LOG
---
Log sequence number 836454100
Log flushed up to   836454100
Pages flushed up to 836454100
Last checkpoint at  836454091
0 pending log flushes, 0 pending chkp writes
59934 log i/o's done, 0.00 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 339552
Buffer pool size   1002
Free buffers       358
Database pages     633
Old database pages 253
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 750184, not young 50079214
0.00 youngs/s, 0.00 non-youngs/s
Pages read 417574, created 900, written 75650
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
No buffer pool page gets since the last printout
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 633, unzip_LRU len: 0
I/O sum[0]: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=11628, Main thread ID=9640, state: sleeping
Number of rows inserted 10896, updated 37224, deleted 2971, read 2883788217
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 0
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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