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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 ]


=====================================
2026-10-19 07:01:35 0x1380 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 29 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 361 srv_active, 0 srv_shutdown, 3251 srv_idle
srv_master_thread log flush and writes: 3612
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 16061
OS WAIT ARRAY INFO: signal count 8471
RW-shared spins 11718, rounds 67737, OS waits 1391
RW-excl spins 23594, rounds 77756, OS waits 246
RW-sx spins 2280, rounds 15633, OS waits 124
Spin rounds per wait: 5.78 RW-shared, 3.30 RW-excl, 6.86 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 65205286
Purge done for trx's n:o < 65205285 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 282940197937368, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 282940197933200, 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
70740 OS file reads, 19203 OS file writes, 7101 OS fsyncs
4.48 reads/s, 16384 avg bytes/read, 0.90 writes/s, 0.62 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 390, seg size 392, 95 merges
merged operations:
 insert 111, delete mark 64, delete 36
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 9 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 3 buffer(s)
4.38 hash searches/s, 12.62 non-hash searches/s
---
LOG
---
Log sequence number 11945146865
Log flushed up to   11945146865
Pages flushed up to 11945146865
Last checkpoint at  11945146856
0 pending log flushes, 0 pending chkp writes
4886 log i/o's done, 0.38 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 563400
Buffer pool size   1003
Free buffers       678
Database pages     307
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 1711, not young 1581780
0.00 youngs/s, 0.00 non-youngs/s
Pages read 70511, created 716, written 13563
4.48 reads/s, 0.00 creates/s, 0.45 writes/s
Buffer pool hit rate 900 / 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: 307, unzip_LRU len: 0
I/O sum[1061]:cur[1], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4252, Main thread ID=5336, state: sleeping
Number of rows inserted 408, updated 78808, deleted 0, read 13649909
0.00 inserts/s, 0.07 updates/s, 0.00 deletes/s, 7.31 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
============================