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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 ]


=====================================
2025-07-01 19:34:29 0x7a7afabb46c0 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 36 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 45592 srv_active, 0 srv_shutdown, 251985 srv_idle
srv_master_thread log flush and writes: 297570
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 80683
OS WAIT ARRAY INFO: signal count 52135
RW-shared spins 33044, rounds 987717, OS waits 32895
RW-excl spins 1967, rounds 19745, OS waits 397
RW-sx spins 4, rounds 108, OS waits 3
Spin rounds per wait: 29.89 RW-shared, 10.04 RW-excl, 27.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 2955706
Purge done for trx's n:o < 2947535 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 416143333699864, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 416143333695640, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (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
202015 OS file reads, 463198 OS file writes, 306330 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 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 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 3 buffer(s)
0.06 hash searches/s, 0.00 non-hash searches/s
---
LOG
---
Log sequence number 94994072
Log flushed up to   94994072
Pages flushed up to 94994072
Last checkpoint at  94994063
0 pending log flushes, 0 pending chkp writes
159801 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 1363960
Buffer pool size   1003
Free buffers       737
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 491, not young 26368
0.00 youngs/s, 0.00 non-youngs/s
Pages read 201453, created 2491, written 254052
0.00 reads/s, 0.00 creates/s, 0.00 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: 256, 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=1231, Main thread ID=134667214776000, state: sleeping
Number of rows inserted 749, updated 49085, deleted 721, read 3694528
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.06 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 600366
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================