Storage engines

InnoDB

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

[ Variablat | Pellgu zbutës | Statusi InnoDB ]

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2026-03-20 04:16:39 0x7f8c740c3700 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 54 seconds
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BACKGROUND THREAD
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srv_master_thread loops: 8775 srv_active, 0 srv_shutdown, 6428 srv_idle
srv_master_thread log flush and writes: 15203
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 28293
OS WAIT ARRAY INFO: signal count 21441
RW-shared spins 0, rounds 10338, OS waits 5157
RW-excl spins 0, rounds 2606, OS waits 89
RW-sx spins 2, rounds 60, OS waits 2
Spin rounds per wait: 10338.00 RW-shared, 2606.00 RW-excl, 30.00 RW-sx
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TRANSACTIONS
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Trx id counter 71394
Purge done for trx's n:o < 71394 undo n:o < 0 state: running but idle
History list length 10
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421716196241912, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421716196237656, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421716196233400, 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, 114604 OS file writes, 57837 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 9.19 writes/s, 3.81 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 0 buffer(s)
Hash table size 69257, node heap has 9 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 25 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
8.04 hash searches/s, 0.93 non-hash searches/s
---
LOG
---
Log sequence number 31404443
Log flushed up to   31404293
Pages flushed up to 31403192
Last checkpoint at  31397449
0 pending log flushes, 0 pending chkp writes
36135 log i/o's done, 2.74 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 146960
Buffer pool size   16024
Free buffers       15072
Database pages     887
Old database pages 345
Modified db pages  3
Percent of dirty pages(LRU & free pages): 0.019
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 183, written 70824
0.00 reads/s, 0.00 creates/s, 6.06 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: 887, 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=901, Main thread ID=140240438142720, state: sleeping
Number of rows inserted 3, updated 16711, deleted 0, read 722311
0.00 inserts/s, 1.94 updates/s, 0.00 deletes/s, 4.33 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 2594
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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