Storage engines

InnoDB

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

[ চলকসমূহ | বাফার পুল | InnoDB'র অবস্থা ]

=====================================
2026-01-13 08:38:50 0x7fe2e02c2700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 10 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 1301 srv_active, 0 srv_shutdown, 2703 srv_idle
srv_master_thread log flush and writes: 4004
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 3839
OS WAIT ARRAY INFO: signal count 3555
RW-shared spins 0, rounds 2565, OS waits 1274
RW-excl spins 0, rounds 273, OS waits 11
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 2565.00 RW-shared, 273.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 41994
Purge done for trx's n:o < 41994 undo n:o < 0 state: running
History list length 25
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 422087398552056, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422087398547800, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 422087398543544, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
838 OS file reads, 16699 OS file writes, 9221 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 5.30 writes/s, 3.70 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 69257, node heap has 0 buffer(s)
Hash table size 69257, node heap has 9 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 3 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
3.90 hash searches/s, 1.10 non-hash searches/s
---
LOG
---
Log sequence number 12017994
Log flushed up to   12015989
Pages flushed up to 12011358
Last checkpoint at  12011349
0 pending log flushes, 0 pending chkp writes
6078 log i/o's done, 2.50 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 130928
Buffer pool size   16024
Free buffers       15147
Database pages     814
Old database pages 320
Modified db pages  53
Percent of dirty pages(LRU & free pages): 0.332
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 679, created 135, written 9569
0.00 reads/s, 0.00 creates/s, 2.40 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: 814, 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=912, Main thread ID=140611650840320, state: sleeping
Number of rows inserted 1, updated 2210, deleted 0, read 128582
0.00 inserts/s, 1.10 updates/s, 0.00 deletes/s, 2.10 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 592
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================