Storage engines

InnoDB

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

[ Variabel | Penampungan Penyangga | Status InnoDB ]

=====================================
2026-08-27 09:50:25 0x3bc8 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 16 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 6857 srv_active, 0 srv_shutdown, 12410 srv_idle
srv_master_thread log flush and writes: 19267
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 126549
OS WAIT ARRAY INFO: signal count 35066
RW-shared spins 4572, rounds 116068, OS waits 3668
RW-excl spins 7087, rounds 47494, OS waits 670
RW-sx spins 25, rounds 871, OS waits 26
Spin rounds per wait: 25.39 RW-shared, 6.70 RW-excl, 34.84 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 20721
Purge done for trx's n:o < 20721 undo n:o < 0 state: running
History list length 12
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283316499347280, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499343112, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499338944, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499297264, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499334776, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499330608, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499326440, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499322272, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499318104, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499313936, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499309768, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499305600, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499301432, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499293096, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499288928, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499284760, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499280592, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499276424, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499255584, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499247248, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499272256, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499268088, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499263920, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499259752, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283316499251416, 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
51866 OS file reads, 75732 OS file writes, 45116 OS fsyncs
2.62 reads/s, 16384 avg bytes/read, 11.62 writes/s, 6.50 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 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 1 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 1 buffer(s)
48.56 hash searches/s, 32.62 non-hash searches/s
---
LOG
---
Log sequence number 21779090
Log flushed up to   21779070
Pages flushed up to 21763351
Last checkpoint at  21743757
0 pending log flushes, 0 pending chkp writes
22381 log i/o's done, 3.62 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 165264
Buffer pool size   1003
Free buffers       733
Database pages     263
Old database pages 0
Modified db pages  41
Percent of dirty pages(LRU & free pages): 4.112
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 51830, created 1732, written 45315
2.62 reads/s, 0.25 creates/s, 6.94 writes/s
Buffer pool hit rate 994 / 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: 263, unzip_LRU len: 0
I/O sum[723]:cur[10], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=1544, Main thread ID=11712, state: sleeping
Number of rows inserted 16916, updated 8789, deleted 1, read 10577674
0.00 inserts/s, 2.44 updates/s, 0.00 deletes/s, 567.59 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 16490
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================