Storage engines

InnoDB

Supports transactions, row-level locking, foreign keys and encryption for tables

[ Variabel | Penampungan Penyangga | Status InnoDB ]

=====================================
2026-04-21 22:48:26 0x7e88 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 36 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 685 srv_active, 0 srv_shutdown, 471532 srv_idle
srv_master_thread log flush and writes: 472217
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 2752
OS WAIT ARRAY INFO: signal count 1608
RW-shared spins 1151, rounds 32844, OS waits 1078
RW-excl spins 379, rounds 1501, OS waits 8
RW-sx spins 5, rounds 112, OS waits 3
Spin rounds per wait: 28.54 RW-shared, 3.96 RW-excl, 22.40 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 31974
Purge done for trx's n:o < 31974 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283623508939688, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508935520, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508931352, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508927184, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508923016, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508918848, not started
mysql tables in use 1, locked 0
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508914680, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508910512, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508906344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508902176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508898008, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283623508893840, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
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 (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (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
4032 OS file reads, 11828 OS file writes, 6613 OS fsyncs
1.61 reads/s, 16384 avg bytes/read, 6.08 writes/s, 2.22 fsyncs/s
-------------------------------------
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 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
7.69 hash searches/s, 18.78 non-hash searches/s
---
LOG
---
Log sequence number 27858399
Log flushed up to   27858399
Pages flushed up to 27858399
Last checkpoint at  27858390
0 pending log flushes, 0 pending chkp writes
4120 log i/o's done, 1.69 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 150240
Buffer pool size   1003
Free buffers       741
Database pages     256
Old database pages 0
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 3968, created 223, written 6844
1.61 reads/s, 0.00 creates/s, 4.19 writes/s
Buffer pool hit rate 977 / 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: 256, unzip_LRU len: 0
I/O sum[209]: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=12824, Main thread ID=11168, state: sleeping
Number of rows inserted 141, updated 1052, deleted 92, read 241919
0.00 inserts/s, 1.33 updates/s, 0.00 deletes/s, 12.42 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1961
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================