Storage engines
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
[
Variables
|
Buffer Pool
|
InnoDB Status
]
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2025-06-06 03:19:30 0x791242d5c640 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 29 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 145 srv_active, 0 srv_shutdown, 6802441 srv_idle
srv_master_thread log flush and writes: 6802430
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SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 1099
--Thread 133118405117504 has waited at srv0srv.cc line 900 for 0.00 seconds the semaphore:
Mutex at 0x5b50263f06d0, Mutex SRV_SYS created srv0srv.cc:1005, lock var 2
OS WAIT ARRAY INFO: signal count 601
RW-shared spins 212, rounds 6274, OS waits 209
RW-excl spins 2, rounds 2, OS waits 0
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 29.59 RW-shared, 1.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 753692
Purge done for trx's n:o < 753692 undo n:o < 0 state: running
History list length 3
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 414594031969000, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414594031964784, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414594031960568, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414594031956352, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414594031952136, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 414594031947920, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
619 OS file reads, 1578 OS file writes, 999 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 0 buffer(s)
Hash table size 4441, node heap has 0 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 0 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
0.72 hash searches/s, 0.41 non-hash searches/s
---
LOG
---
Log sequence number 39880621
Log flushed up to 39880621
Pages flushed up to 39880621
Last checkpoint at 39880612
0 pending log flushes, 0 pending chkp writes
679 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 75640
Buffer pool size 1003
Free buffers 745
Database pages 255
Old database pages 0
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 584, created 139, written 793
0.00 reads/s, 0.00 creates/s, 0.00 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: 255, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
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ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=1950, Main thread ID=133118564501056, state: sleeping
Number of rows inserted 0, updated 143, deleted 0, read 3030
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.72 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 811
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
