Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variabel
|
Penampungan Penyangga
|
Status InnoDB
]
=====================================
2026-08-06 22:56:12 0x7f02e95a2640 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 57 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 1068 srv_active, 0 srv_shutdown, 26156 srv_idle
srv_master_thread log flush and writes: 27223
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 134871
OS WAIT ARRAY INFO: signal count 73461
RW-shared spins 698, rounds 20802, OS waits 681
RW-excl spins 49, rounds 793, OS waits 22
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.80 RW-shared, 16.18 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 7382412
Purge done for trx's n:o < 7382411 undo n:o < 0 state: running but idle
History list length 14
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421155281003032, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421155280998808, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421155280994584, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 421155280990360, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
178381 OS file reads, 15231 OS file writes, 5836 OS fsyncs
0.11 reads/s, 16384 avg bytes/read, 9.19 writes/s, 2.40 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 11, seg size 13, 11 merges
merged operations:
insert 11, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
0.00 hash searches/s, 195.10 non-hash searches/s
---
LOG
---
Log sequence number 11316756696
Log flushed up to 11316756696
Pages flushed up to 11316744145
Last checkpoint at 11316744145
0 pending log flushes, 0 pending chkp writes
6496 log i/o's done, 3.75 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 16777216000
Dictionary memory allocated 12997880
Buffer pool size 963240
Free buffers 791184
Database pages 172056
Old database pages 63668
Modified db pages 23
Percent of dirty pages(LRU & free pages): 0.002
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 2, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 171910, created 146, written 7036
0.11 reads/s, 0.04 creates/s, 4.72 writes/s
Buffer pool hit rate 999 / 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: 172056, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
----------------------
INDIVIDUAL BUFFER POOL INFO
----------------------
---BUFFER POOL 0
Buffer pool size 120405
Free buffers 98089
Database pages 22316
Old database pages 8257
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 1, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 22311, created 5, written 803
0.02 reads/s, 0.00 creates/s, 0.79 writes/s
Buffer pool hit rate 999 / 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: 22316, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 1
Buffer pool size 120405
Free buffers 98904
Database pages 21501
Old database pages 7956
Modified db pages 6
Percent of dirty pages(LRU & free pages): 0.005
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 21501, created 0, written 1142
0.00 reads/s, 0.00 creates/s, 0.49 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: 21501, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 2
Buffer pool size 120405
Free buffers 99386
Database pages 21019
Old database pages 7778
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 1, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 21014, created 5, written 90
0.02 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 999 / 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: 21019, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 3
Buffer pool size 120405
Free buffers 98979
Database pages 21426
Old database pages 7929
Modified db pages 12
Percent of dirty pages(LRU & free pages): 0.010
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 21425, created 1, written 1837
0.02 reads/s, 0.00 creates/s, 1.67 writes/s
Buffer pool hit rate 999 / 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: 21426, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 4
Buffer pool size 120405
Free buffers 98471
Database pages 21934
Old database pages 8116
Modified db pages 4
Percent of dirty pages(LRU & free pages): 0.003
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 21931, created 3, written 1820
0.05 reads/s, 0.04 creates/s, 1.60 writes/s
Buffer pool hit rate 998 / 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: 21934, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 5
Buffer pool size 120405
Free buffers 99442
Database pages 20963
Old database pages 7758
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 20960, created 3, written 429
0.00 reads/s, 0.00 creates/s, 0.09 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: 20963, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 6
Buffer pool size 120405
Free buffers 99625
Database pages 20780
Old database pages 7690
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 20715, created 65, written 114
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: 20780, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
---BUFFER POOL 7
Buffer pool size 120405
Free buffers 98288
Database pages 22117
Old database pages 8184
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 22053, created 64, written 801
0.00 reads/s, 0.00 creates/s, 0.09 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: 22117, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=1319, Main thread ID=139650635122240, state: sleeping
Number of rows inserted 231, updated 1993, deleted 7, read 1703311
0.02 inserts/s, 1.42 updates/s, 0.00 deletes/s, 98.17 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 6457
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
