Storage engines

InnoDB

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

[ Variabler | Buffertutrymme | InnoDB-status ]

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2025-11-23 14:35:45 0x7f5278552700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 45 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 26073 srv_active, 0 srv_shutdown, 26055 srv_idle
srv_master_thread log flush and writes: 52124
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 81364
OS WAIT ARRAY INFO: signal count 71072
RW-shared spins 0, rounds 36883, OS waits 18320
RW-excl spins 0, rounds 8086, OS waits 275
RW-sx spins 7, rounds 210, OS waits 6
Spin rounds per wait: 36883.00 RW-shared, 8086.00 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 300512
Purge done for trx's n:o < 300512 undo n:o < 0 state: running but idle
History list length 16
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421467180913144, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421467180908888, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421467180904632, 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
891 OS file reads, 371950 OS file writes, 189573 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 4.76 writes/s, 2.87 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 2 buffer(s)
Hash table size 69257, node heap has 11 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)
1.67 hash searches/s, 0.67 non-hash searches/s
---
LOG
---
Log sequence number 185902123
Log flushed up to   185902123
Pages flushed up to 185902123
Last checkpoint at  185896729
0 pending log flushes, 0 pending chkp writes
118281 log i/o's done, 1.87 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 130928
Buffer pool size   16024
Free buffers       15102
Database pages     852
Old database pages 334
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 710, created 142, written 227731
0.00 reads/s, 0.00 creates/s, 2.56 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: 852, unzip_LRU len: 0
I/O sum[0]:cur[3], 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=533, Main thread ID=139991430719232, state: sleeping
Number of rows inserted 0, updated 54387, deleted 0, read 5686684
0.00 inserts/s, 0.51 updates/s, 0.00 deletes/s, 1.07 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 31635
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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