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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 09:54:11 0x8430 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 56 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 8048 srv_active, 0 srv_shutdown, 55863 srv_idle
srv_master_thread log flush and writes: 63911
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 6999
OS WAIT ARRAY INFO: signal count 6915
RW-shared spins 16803, rounds 292476, OS waits 5161
RW-excl spins 14, rounds 367, OS waits 12
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 17.41 RW-shared, 26.21 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 2230787
Purge done for trx's n:o < 2230787 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283650826604760, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283650826600592, 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
466483 OS file reads, 105423 OS file writes, 62185 OS fsyncs
0.14 reads/s, 16384 avg bytes/read, 1.50 writes/s, 1.07 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 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 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 1 buffer(s)
0.93 hash searches/s, 1.75 non-hash searches/s
---
LOG
---
Log sequence number 176308178
Log flushed up to   176308178
Pages flushed up to 176308178
Last checkpoint at  176306373
0 pending log flushes, 0 pending chkp writes
29989 log i/o's done, 0.64 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 132712
Buffer pool size   1003
Free buffers       741
Database pages     256
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 1299, not young 2188
0.00 youngs/s, 0.00 non-youngs/s
Pages read 466427, created 740, written 63533
0.14 reads/s, 0.00 creates/s, 0.71 writes/s
Buffer pool hit rate 981 / 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: 256, unzip_LRU len: 0
I/O sum[21]:cur[19], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=6304, Main thread ID=8004, state: sleeping
Number of rows inserted 4, updated 14101, deleted 0, read 991063
0.00 inserts/s, 0.14 updates/s, 0.00 deletes/s, 0.87 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 35471
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================