Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2026-02-15 07:54:49 0x432c INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 37 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 7153 srv_active, 0 srv_shutdown, 46757 srv_idle
srv_master_thread log flush and writes: 53910
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 135621
OS WAIT ARRAY INFO: signal count 16542
RW-shared spins 2113, rounds 61820, OS waits 2032
RW-excl spins 158, rounds 598, OS waits 11
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.26 RW-shared, 3.78 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 272555
Purge done for trx's n:o < 272555 undo n:o < 0 state: running
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283571264373096, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283571264364760, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283571264368928, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283571264360592, 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
29535 OS file reads, 94199 OS file writes, 50696 OS fsyncs
1.43 reads/s, 16384 avg bytes/read, 5.00 writes/s, 2.05 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 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 1 buffer(s)
6.00 hash searches/s, 14.81 non-hash searches/s
---
LOG
---
Log sequence number 66361659
Log flushed up to   66361639
Pages flushed up to 66344017
Last checkpoint at  66344008
0 pending log flushes, 0 pending chkp writes
26389 log i/o's done, 1.65 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 147736
Buffer pool size   1003
Free buffers       732
Database pages     264
Old database pages 0
Modified db pages  37
Percent of dirty pages(LRU & free pages): 3.711
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 145, not young 900
0.00 youngs/s, 0.00 non-youngs/s
Pages read 29472, created 654, written 58679
1.43 reads/s, 0.03 creates/s, 3.19 writes/s
Buffer pool hit rate 975 / 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: 264, unzip_LRU len: 0
I/O sum[166]:cur[5], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=13208, Main thread ID=12836, state: sleeping
Number of rows inserted 81, updated 14804, deleted 0, read 2887323
0.00 inserts/s, 1.30 updates/s, 0.00 deletes/s, 6.03 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 28706
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================