Storage engines

InnoDB

Supports transactions, row-level locking, and foreign keys

[ Variables | Buffer Pool | InnoDB Status ]

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2026-08-06 13:21:43 0x954 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 9 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 136402 srv_active, 0 srv_shutdown, 1668543 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 22769
OS WAIT ARRAY INFO: signal count 22666
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 1964889
Purge done for trx's n:o < 1964889 undo n:o < 0 state: running but idle
History list length 10
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
40997 OS file reads, 1819328 OS file writes, 1183319 OS fsyncs
0.43 reads/s, 16384 avg bytes/read, 4.44 writes/s, 3.79 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 53 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 5 buffer(s)
442.51 hash searches/s, 346.96 non-hash searches/s
---
LOG
---
Log capacity                 104857600
Log capacity used            104857600
Log sequence number          5461635003
Log buffer assigned up to    5461635003
Log buffer completed up to   5461635003
Log written up to            5461635003
Log flushed up to            5461635003
Added dirty pages up to      5461635003
Pages flushed up to          5461613533
Last checkpoint at           5461613533
Log minimum file id is       1666
Log maximum file id is       1667
712919 log i/o's done, 4.33 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 0
Dictionary memory allocated 7049675
Buffer pool size   8191
Free buffers       1024
Database pages     6922
Old database pages 2535
Modified db pages  31
Pending reads      0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 10947, not young 582239
0.00 youngs/s, 0.43 non-youngs/s
Pages read 34432, created 3891, written 811012
0.43 reads/s, 0.00 creates/s, 0.11 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: 6922, unzip_LRU len: 0
I/O sum[132]: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=3732, Main thread ID=20408 , state=sleeping
Number of rows inserted 187373, updated 68016, deleted 39885, read 70545971
0.22 inserts/s, 0.33 updates/s, 0.22 deletes/s, 276.86 reads/s
Number of system rows inserted 15299, updated 6275, deleted 5000, read 27483280
0.00 inserts/s, 0.22 updates/s, 0.00 deletes/s, 629.60 reads/s
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END OF INNODB MONITOR OUTPUT
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