Storage engines
InnoDB
Percona-XtraDB, Supports transactions, row-level locking, and foreign keys
[ Variables | Buffer Pool | InnoDB Status ]
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2026-04-15 22:09:28 42d8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 38 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 67366 srv_active, 0 srv_shutdown, 2450351 srv_idle
srv_master_thread log flush and writes: 2517697
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 3370801
OS WAIT ARRAY INFO: signal count 1905243
Mutex spin waits 3726649, rounds 153039924, OS waits 3218867
RW-shared spins 45033, rounds 1514431, OS waits 50188
RW-excl spins 21014, rounds 84998, OS waits 1059
Spin rounds per wait: 41.07 mutex, 33.63 RW-shared, 4.04 RW-excl
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TRANSACTIONS
------------
Trx id counter 92023301
Purge done for trx's n:o < 86487140 undo n:o < 0 state: running but idle
History list length 872
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 25019812, OS thread handle 0x42d8, query id 316582610 localhost 127.0.0.1 root init
SHOW ENGINE INNODB STATUS
---TRANSACTION 92023300, not started
MySQL thread id 25019809, OS thread handle 0x42d8, query id 316582605 localhost 127.0.0.1 root
---TRANSACTION 69168643, not started
MySQL thread id 1, OS thread handle 0x9398, query id 0 Waiting for background binlog tasks
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FILE I/O
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I/O thread 0 state: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (read thread)
I/O thread 7 state: native aio handle (read thread)
I/O thread 8 state: native aio handle (read thread)
I/O thread 9 state: native aio handle (read thread)
I/O thread 10 state: native aio handle (write thread)
I/O thread 11 state: native aio handle (write thread)
I/O thread 12 state: native aio handle (write thread)
I/O thread 13 state: native aio handle (write thread)
I/O thread 14 state: native aio handle (write thread)
I/O thread 15 state: native aio handle (write thread)
I/O thread 16 state: native aio handle (write thread)
I/O thread 17 state: native aio handle (write thread)
Pending normal aio reads: 0 [0, 0, 0, 0, 0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0, 0, 0, 0, 0] ,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
119936 OS file reads, 4538704 OS file writes, 208397 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.18 writes/s, 0.18 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, 3 merges
merged operations:
insert 0, delete mark 3, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
499.57 hash searches/s, 190.73 non-hash searches/s
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LOG
---
Log sequence number 121237368240
Log flushed up to 121237368210
Pages flushed up to 121237368060
Last checkpoint at 121237368060
Max checkpoint age 869019772
Checkpoint age target 841862905
Modified age 180
Checkpoint age 180
0 pending log writes, 0 pending chkp writes
3380118 log i/o's done, 0.13 log i/o's/second
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BUFFER POOL AND MEMORY
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Total memory allocated 5557452800; in additional pool allocated 0
Total memory allocated by read views 109642960
Internal hash tables (constant factor + variable factor)
Adaptive hash index 130026448 (84999016 + 45027432)
Page hash 1329176 (buffer pool 0 only)
Dictionary cache 46897163 (21251248 + 25645915)
File system 5641712 (812272 + 4829440)
Lock system 13283056 (13281976 + 1080)
Recovery system 0 (0 + 0)
Dictionary memory allocated 25645915
Buffer pool size 327676
Buffer pool size, bytes 5368643584
Free buffers 4096
Database pages 320832
Old database pages 118350
Modified db pages 1
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 63231, not young 5205356
0.00 youngs/s, 0.00 non-youngs/s
Pages read 112984, created 1095829, written 1086754
0.00 reads/s, 0.00 creates/s, 0.03 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: 320832, unzip_LRU len: 0
I/O sum[4]:cur[0], unzip sum[0]:cur[0]
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INDIVIDUAL BUFFER POOL INFO
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---BUFFER POOL 0
Buffer pool size 81919
Buffer pool size, bytes 1342160896
Free buffers 1024
Database pages 80216
Old database pages 29590
Modified db pages 1
Percent of dirty pages(LRU & free pages): 0.001
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 15447, not young 1530511
0.00 youngs/s, 0.00 non-youngs/s
Pages read 28127, created 274308, written 301599
0.00 reads/s, 0.00 creates/s, 0.03 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: 80216, unzip_LRU len: 0
I/O sum[1]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 1
Buffer pool size 81919
Buffer pool size, bytes 1342160896
Free buffers 1024
Database pages 80203
Old database pages 29586
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 15561, not young 1258994
0.00 youngs/s, 0.00 non-youngs/s
Pages read 28088, created 273468, written 261568
0.00 reads/s, 0.00 creates/s, 0.00 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: 80203, unzip_LRU len: 0
I/O sum[1]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 2
Buffer pool size 81919
Buffer pool size, bytes 1342160896
Free buffers 1024
Database pages 80203
Old database pages 29586
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 16343, not young 1098446
0.00 youngs/s, 0.00 non-youngs/s
Pages read 28503, created 274229, written 258852
0.00 reads/s, 0.00 creates/s, 0.00 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: 80203, unzip_LRU len: 0
I/O sum[1]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 3
Buffer pool size 81919
Buffer pool size, bytes 1342160896
Free buffers 1024
Database pages 80210
Old database pages 29588
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 15880, not young 1317405
0.00 youngs/s, 0.00 non-youngs/s
Pages read 28266, created 273824, written 264735
0.00 reads/s, 0.00 creates/s, 0.00 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: 80210, unzip_LRU len: 0
I/O sum[1]: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
0 RW transactions active inside InnoDB
0 RO transactions active inside InnoDB
0 out of 1000 descriptors used
Main thread id 34588, state: sleeping
Number of rows inserted 373856689, updated 1791, deleted 0, read 7537544187
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 1569.35 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 326
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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mysqli::real_connect(): (HY000/1045): Access denied for user 'pma'@'localhost' (using password: NO)
Connection for controluser as defined in your configuration failed.