Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-02-19 05:09:56 0x1c40 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 24 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 6435 srv_active, 0 srv_shutdown, 2107914 srv_idle
srv_master_thread log flush and writes: 0
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 115493
OS WAIT ARRAY INFO: signal count 114917
RW-shared spins 0, rounds 0, OS waits 0
RW-excl spins 0, rounds 0, OS waits 0
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 RW-shared, 0.00 RW-excl, 0.00 RW-sx
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TRANSACTIONS
------------
Trx id counter 5388
Purge done for trx's n:o < 5388 undo n:o < 0 state: running but idle
History list length 7
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284319399613504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399612728, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284319399611952, 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: wait Windows aio (insert buffer thread)
I/O thread 1 state: wait Windows aio (read thread)
I/O thread 2 state: wait Windows aio (read thread)
I/O thread 3 state: wait Windows aio (read thread)
I/O thread 4 state: wait Windows aio (read thread)
I/O thread 5 state: wait Windows aio (write thread)
I/O thread 6 state: wait Windows aio (write thread)
I/O thread 7 state: wait Windows aio (write thread)
I/O thread 8 state: wait Windows aio (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
 ibuf aio reads:
Pending flushes (fsync) log: 0; buffer pool: 0
1526 OS file reads, 19370 OS file writes, 9056 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 1.31 writes/s, 0.90 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
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 34679, node heap has 7 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 3 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
297.57 hash searches/s, 103.12 non-hash searches/s
---
LOG
---
Log sequence number          20021008
Log buffer assigned up to    20021008
Log buffer completed up to   20021008
Log written up to            20021008
Log flushed up to            20021008
Added dirty pages up to      20021008
Pages flushed up to          20018986
Last checkpoint at           20018986
Log minimum file id is       5
Log maximum file id is       6
3960 log i/o's done, 0.62 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 605918
Buffer pool size   8191
Free buffers       6761
Database pages     1409
Old database pages 529
Modified db pages  20
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 7110, not young 2797
0.37 youngs/s, 7.76 non-youngs/s
Pages read 974, created 5089, written 9754
0.00 reads/s, 0.99 creates/s, 0.04 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 8 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1409, unzip_LRU len: 0
I/O sum[1]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=6040, Main thread ID=4252 , state=sleeping
Number of rows inserted 379792, updated 0, deleted 0, read 320265
16.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 16.00 reads/s
Number of system rows inserted 140, updated 1857, deleted 8, read 4927766
0.00 inserts/s, 0.29 updates/s, 0.00 deletes/s, 360.40 reads/s
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END OF INNODB MONITOR OUTPUT
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