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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 19:36:19 0x5c1c INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 11 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 57613 srv_active, 0 srv_shutdown, 4529 srv_idle
srv_master_thread log flush and writes: 62142
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 3804325
OS WAIT ARRAY INFO: signal count 140809
RW-shared spins 13648, rounds 400937, OS waits 10967
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 1887171
Purge done for trx's n:o < 1887171 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 283848590807400, 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 283848590799064, 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)
--------
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
128045 OS file reads, 729543 OS file writes, 404559 OS fsyncs
1.73 reads/s, 16384 avg bytes/read, 11.45 writes/s, 5.91 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)
24.82 hash searches/s, 58.45 non-hash searches/s
---
LOG
---
Log sequence number 1107341266
Log flushed up to   1107341266
Pages flushed up to 1107336587
Last checkpoint at  1107332677
0 pending log flushes, 0 pending chkp writes
212936 log i/o's done, 3.09 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 120192
Buffer pool size   1003
Free buffers       741
Database pages     256
Old database pages 0
Modified db pages  9
Percent of dirty pages(LRU & free pages): 0.902
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 127977, created 5283, written 436299
1.73 reads/s, 0.09 creates/s, 7.27 writes/s
Buffer pool hit rate 990 / 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[313]:cur[2], 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 127353, deleted 77, read 5758529
0.00 inserts/s, 1.82 updates/s, 0.00 deletes/s, 35.00 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
============================