Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

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2025-12-03 02:40:57 0x7f9050f7a700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 32 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 5269 srv_active, 0 srv_shutdown, 4231 srv_idle
srv_master_thread log flush and writes: 9500
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 17395
OS WAIT ARRAY INFO: signal count 15419
RW-shared spins 0, rounds 6764, OS waits 3349
RW-excl spins 0, rounds 1895, OS waits 63
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 6764.00 RW-shared, 1895.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
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Trx id counter 61570
Purge done for trx's n:o < 61570 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421732808651256, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421732808647000, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421732808642744, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
863 OS file reads, 77558 OS file writes, 39197 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 6.69 writes/s, 3.44 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 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 10 buffer(s)
Hash table size 69257, node heap has 2 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 3 buffer(s)
Hash table size 69257, node heap has 26 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
4.44 hash searches/s, 1.06 non-hash searches/s
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LOG
---
Log sequence number 23581503
Log flushed up to   23580294
Pages flushed up to 23580091
Last checkpoint at  23577007
0 pending log flushes, 0 pending chkp writes
23756 log i/o's done, 2.31 log i/o's/second
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BUFFER POOL AND MEMORY
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Total large memory allocated 285212672
Dictionary memory allocated 130928
Buffer pool size   16024
Free buffers       15101
Database pages     855
Old database pages 328
Modified db pages  49
Percent of dirty pages(LRU & free pages): 0.307
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 704, created 151, written 48258
0.00 reads/s, 0.00 creates/s, 4.00 writes/s
Buffer pool hit rate 1000 / 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: 855, 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=907, Main thread ID=140257123104512, state: sleeping
Number of rows inserted 1, updated 11571, deleted 0, read 1292388
0.00 inserts/s, 1.16 updates/s, 0.00 deletes/s, 2.66 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1387
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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