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存储引擎

InnoDB 文档

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

[ 变量 | 缓冲池 | InnoDB 状态 ]


=====================================
2025-07-11 11:19:32 0x7f3efca0b700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 45 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 8239 srv_active, 0 srv_shutdown, 32250 srv_idle
srv_master_thread log flush and writes: 40486
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 28079
OS WAIT ARRAY INFO: signal count 20022
RW-shared spins 0, rounds 16756, OS waits 8373
RW-excl spins 0, rounds 1655, OS waits 55
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 16756.00 RW-shared, 1655.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 57512
Purge done for trx's n:o < 57512 undo n:o < 0 state: running but idle
History list length 14
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421383485153784, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421383485149528, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421383485145272, 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
863 OS file reads, 90274 OS file writes, 57784 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 1.31 writes/s, 1.13 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 1 buffer(s)
Hash table size 69257, node heap has 11 buffer(s)
Hash table size 69257, node heap has 2 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 26 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
0.40 hash searches/s, 0.53 non-hash searches/s
---
LOG
---
Log sequence number 22807620
Log flushed up to   22807620
Pages flushed up to 22807620
Last checkpoint at  22807611
0 pending log flushes, 0 pending chkp writes
35136 log i/o's done, 0.73 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 128256
Buffer pool size   16024
Free buffers       15105
Database pages     850
Old database pages 328
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 704, created 146, written 47513
0.00 reads/s, 0.00 creates/s, 0.44 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: 850, 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=904, Main thread ID=139907737573120, state: sleeping
Number of rows inserted 1, updated 10036, deleted 0, read 6085302
0.00 inserts/s, 0.16 updates/s, 0.00 deletes/s, 0.36 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 22660
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.02 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================