Storage engines

InnoDB

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

[ Variables | Buffer Pool | InnoDB Status ]

=====================================
2025-12-13 20:06:53 0x3b58 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 57 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 29076 srv_active, 0 srv_shutdown, 112038 srv_idle
srv_master_thread log flush and writes: 141114
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 541891
OS WAIT ARRAY INFO: signal count 255083
RW-shared spins 250494, rounds 4343724, OS waits 64360
RW-excl spins 162733, rounds 624313, OS waits 3550
RW-sx spins 195, rounds 2507, OS waits 47
Spin rounds per wait: 17.34 RW-shared, 3.84 RW-excl, 12.86 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 14550493
Purge done for trx's n:o < 14550493 undo n:o < 0 state: running but idle
History list length 1
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283879747098016, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747106352, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747085512, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747093848, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747089680, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747060504, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747043832, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747077176, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747073008, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747056336, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747052168, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747022992, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747068840, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747048000, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747064672, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747027160, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747031328, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747118856, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747102184, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747081344, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747035496, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283879747039664, 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
23476406 OS file reads, 285845 OS file writes, 121213 OS fsyncs
54.95 reads/s, 16384 avg bytes/read, 13.74 writes/s, 5.42 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 146, seg size 148, 16080 merges
merged operations:
 insert 30190, delete mark 1000, delete 409
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 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)
1987.65 hash searches/s, 1988.72 non-hash searches/s
---
LOG
---
Log sequence number 11576760150
Log flushed up to   11576760130
Pages flushed up to 11576758098
Last checkpoint at  11576699564
0 pending log flushes, 0 pending chkp writes
75697 log i/o's done, 3.65 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 150994944
Dictionary memory allocated 8698896
Buffer pool size   1003
Free buffers       729
Database pages     266
Old database pages 0
Modified db pages  29
Percent of dirty pages(LRU & free pages): 2.912
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 470747, not young 639510149
0.88 youngs/s, 3399.05 non-youngs/s
Pages read 23472698, created 1607, written 194876
54.95 reads/s, 0.05 creates/s, 9.37 writes/s
Buffer pool hit rate 995 / 1000, young-making rate 0 / 1000 not 283 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 266, unzip_LRU len: 0
I/O sum[3390]:cur[33], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4484, Main thread ID=6712, state: sleeping
Number of rows inserted 35629, updated 3641, deleted 17494, read 1028177296
0.32 inserts/s, 2.26 updates/s, 0.32 deletes/s, 6501.03 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 0
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================