Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2026-11-10 01:06:15 0x28e0 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 33 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 81 srv_active, 0 srv_shutdown, 29734 srv_idle
srv_master_thread log flush and writes: 29815
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 890
OS WAIT ARRAY INFO: signal count 339
RW-shared spins 244, rounds 7034, OS waits 225
RW-excl spins 143, rounds 1863, OS waits 19
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 28.83 RW-shared, 13.03 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 114313
Purge done for trx's n:o < 113778 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284006025863384, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284006025859216, 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
6984 OS file reads, 1331 OS file writes, 511 OS fsyncs
1.45 reads/s, 16384 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 182, seg size 184, 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 2 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 2 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.00 hash searches/s, 7.33 non-hash searches/s
---
LOG
---
Log sequence number 779772486
Log flushed up to   779772486
Pages flushed up to 779772486
Last checkpoint at  779772477
0 pending log flushes, 0 pending chkp writes
306 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 1399736
Buffer pool size   1003
Free buffers       0
Database pages     993
Old database pages 346
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 655, not young 42254
1.18 youngs/s, 2.12 non-youngs/s
Pages read 6419, created 140, written 988
1.45 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 969 / 1000, young-making rate 25 / 1000 not 45 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 993, unzip_LRU len: 0
I/O sum[67]: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=1676, Main thread ID=17240, state: sleeping
Number of rows inserted 79, updated 29, deleted 0, read 346240
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 155.60 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 22248
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================