Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-08-06 12:11:42 0x2eac INNODB MONITOR OUTPUT
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Per second averages calculated from the last 10 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 134894 srv_active, 0 srv_shutdown, 1665880 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 22534
OS WAIT ARRAY INFO: signal count 22429
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 1959739
Purge done for trx's n:o < 1959738 undo n:o < 0 state: running but idle
History list length 9
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282876338837888, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282876338837112, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282876338836336, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
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
35866 OS file reads, 1812094 OS file writes, 1177834 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 8.30 writes/s, 5.93 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 3 merges
merged operations:
 insert 6, delete mark 6, delete 2
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 34679, node heap has 70 buffer(s)
Hash table size 34679, node heap has 61 buffer(s)
Hash table size 34679, node heap has 32 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
Hash table size 34679, node heap has 16 buffer(s)
Hash table size 34679, node heap has 10 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 6 buffer(s)
837.92 hash searches/s, 414.86 non-hash searches/s
---
LOG
---
Log capacity                 104857600
Log capacity used            104857600
Log sequence number          5460486005
Log buffer assigned up to    5460486005
Log buffer completed up to   5460486005
Log written up to            5460486005
Log flushed up to            5460486005
Added dirty pages up to      5460486005
Pages flushed up to          5460485889
Last checkpoint at           5460485889
Log minimum file id is       1666
Log maximum file id is       1667
708763 log i/o's done, 4.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 6486040
Buffer pool size   8191
Free buffers       1024
Database pages     6964
Old database pages 2550
Modified db pages  2
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 10203, not young 428698
0.00 youngs/s, 0.00 non-youngs/s
Pages read 29301, created 3537, written 808871
0.00 reads/s, 0.10 creates/s, 3.36 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: 6964, unzip_LRU len: 0
I/O sum[56]: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=3732, Main thread ID=20408 , state=sleeping
Number of rows inserted 162273, updated 67874, deleted 39789, read 70368506
0.40 inserts/s, 0.30 updates/s, 0.40 deletes/s, 194.18 reads/s
Number of system rows inserted 15299, updated 6023, deleted 5000, read 21464631
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1211.98 reads/s
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END OF INNODB MONITOR OUTPUT
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