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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 ]


=====================================
2026-03-19 19:36:08 0x65d4 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 46 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 57603 srv_active, 0 srv_shutdown, 4528 srv_idle
srv_master_thread log flush and writes: 62131
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 3803603
OS WAIT ARRAY INFO: signal count 140794
RW-shared spins 13646, rounds 400877, OS waits 10966
RW-excl spins 769, rounds 19514, OS waits 540
RW-sx spins 14, rounds 330, OS waits 8
Spin rounds per wait: 29.38 RW-shared, 25.38 RW-excl, 23.57 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 1887130
Purge done for trx's n:o < 1887130 undo n:o < 0 state: running
History list length 6
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283848590824072, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590803232, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590819904, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590807400, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590799064, not started flushing log
mysql tables in use 1, locked 1
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590811568, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590794896, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590832408, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 283848590815736, 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: 1; buffer pool: 0
128026 OS file reads, 729417 OS file writes, 404494 OS fsyncs
1.85 reads/s, 16384 avg bytes/read, 7.09 writes/s, 4.09 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 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)
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)
16.37 hash searches/s, 22.93 non-hash searches/s
---
LOG
---
Log sequence number 1107316161
Log flushed up to   1107314955
Pages flushed up to 1107313789
Last checkpoint at  1107307290
1 pending log flushes, 0 pending chkp writes
212902 log i/o's done, 2.13 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 120192
Buffer pool size   1003
Free buffers       739
Database pages     258
Old database pages 0
Modified db pages  5
Percent of dirty pages(LRU & free pages): 0.501
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 127958, created 5282, written 436219
1.85 reads/s, 0.07 creates/s, 4.17 writes/s
Buffer pool hit rate 982 / 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: 258, unzip_LRU len: 0
I/O sum[309]:cur[9], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=17728, Main thread ID=5776, state: sleeping
Number of rows inserted 177, updated 127333, deleted 77, read 5758144
0.00 inserts/s, 0.98 updates/s, 0.00 deletes/s, 50.89 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 2453
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================