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儲存引擎

InnoDB 說明文件

Supports transactions, row-level locking, foreign keys and encryption for tables

[ 變數 | 緩衝池 | InnoDB 狀態 ]


=====================================
2024-09-20 10:43:06 0x7f81b817d700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 51 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 6501 srv_active, 0 srv_shutdown, 31800 srv_idle
srv_master_thread log flush and writes: 38294
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 23817
OS WAIT ARRAY INFO: signal count 19294
RW-shared spins 0, rounds 22082, OS waits 11050
RW-excl spins 0, rounds 698, OS waits 27
RW-sx spins 0, rounds 0, OS waits 0
Spin rounds per wait: 22082.00 RW-shared, 698.00 RW-excl, 0.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 51530
Purge done for trx's n:o < 51530 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421669867155960, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421669867151704, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421669867147448, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (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
867 OS file reads, 76251 OS file writes, 54446 OS fsyncs
0.04 reads/s, 16384 avg bytes/read, 4.18 writes/s, 2.43 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 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 10 buffer(s)
Hash table size 69257, node heap has 2 buffer(s)
Hash table size 69257, node heap has 25 buffer(s)
Hash table size 69257, node heap has 1 buffer(s)
Hash table size 69257, node heap has 3 buffer(s)
Hash table size 69257, node heap has 26 buffer(s)
Hash table size 69257, node heap has 0 buffer(s)
0.92 hash searches/s, 3.04 non-hash searches/s
---
LOG
---
Log sequence number 17977932
Log flushed up to   17977932
Pages flushed up to 17977932
Last checkpoint at  17977889
0 pending log flushes, 0 pending chkp writes
35548 log i/o's done, 1.57 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 285212672
Dictionary memory allocated 136272
Buffer pool size   16024
Free buffers       15060
Database pages     896
Old database pages 333
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 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 708, created 188, written 34407
0.04 reads/s, 0.00 creates/s, 2.35 writes/s
Buffer pool hit rate 997 / 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: 896, 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=906, Main thread ID=140194393036544, state: sleeping
Number of rows inserted 7, updated 6946, deleted 0, read 962011
0.00 inserts/s, 0.31 updates/s, 0.00 deletes/s, 0.92 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 1364
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================