MySQL 5.6修改REDO日志的大小和个数

快来打我* 2024-04-18 02:15 52阅读 0赞

一套线上环境的REDO日志的大小和格式设置的不合理，需要将日志大小修改成2G，个数改为5个。

1.  \# 修改参数文件  
    
2.  \# vi /etc/my\_56.cnf  
    
3.  innodb\_log\_file\_size = 2G  
    
4.  innodb\_log\_files\_in\_group = 5  
    
5.    
    
6.  \# 重启数据库  
    
7.    
    
8.  \# 启动的时候，查看错误日志，可以看到重新初始化了REDO日志  
    
9.  2018-05-28 09:40:54 25439 \[Note\] Plugin 'FEDERATED' is disabled.  
    
10. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Using atomics to ref count buffer pool pages  
    
11. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: The InnoDB memory heap is disabled  
    
12. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Mutexes and rw\_locks use GCC atomic builtins  
    
13. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Memory barrier is not used  
    
14. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Compressed tables use zlib 1.2.3  
    
15. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Using Linux native AIO  
    
16. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Using CPU crc32 instructions  
    
17. 2018-05-28 09:40:54 25439 \[Note\] InnoDB: Initializing buffer pool, size = 1.0G  
    
18. 2018-05-28 09:40:55 25439 \[Note\] InnoDB: Completed initialization of buffer pool  
    
19. 2018-05-28 09:40:55 25439 \[Note\] InnoDB: Highest supported file format is Barracuda.  
    
20. 2018-05-28 09:40:55 25439 \[Warning\] InnoDB: Resizing redo log from 2\*3072 to 5\*131072 pages, LSN=19620839567  
    
21. 2018-05-28 09:40:55 25439 \[Warning\] InnoDB: Starting to delete and rewrite log files.  
    
22. 2018-05-28 09:40:55 25439 \[Note\] InnoDB: Setting log file ./ib\_logfile101 size to 2048 MB  
    
23. InnoDB: Progress in MB: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000  
    
24. 2018-05-28 09:41:06 25439 \[Note\] InnoDB: Setting log file ./ib\_logfile1 size to 2048 MB  
    
25. InnoDB: Progress in MB: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000  
    
26. 2018-05-28 09:41:16 25439 \[Note\] InnoDB: Setting log file ./ib\_logfile2 size to 2048 MB  
    
27. InnoDB: Progress in MB: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000  
    
28. 2018-05-28 09:41:26 25439 \[Note\] InnoDB: Setting log file ./ib\_logfile3 size to 2048 MB  
    
29. InnoDB: Progress in MB: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000  
    
30. 2018-05-28 09:41:36 25439 \[Note\] InnoDB: Setting log file ./ib\_logfile4 size to 2048 MB  
    
31. InnoDB: Progress in MB: 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000  
    
32. 2018-05-28 09:41:46 25439 \[Note\] InnoDB: Renaming log file ./ib\_logfile101 to ./ib\_logfile0  
    
33. 2018-05-28 09:41:46 25439 \[Warning\] InnoDB: New log files created, LSN=19620839567  
    
34. 2018-05-28 09:41:46 25439 \[Note\] InnoDB: 128 rollback segment(s) are active.  
    
35. 2018-05-28 09:41:46 25439 \[Note\] InnoDB: Waiting for purge to start  
    
36. 2018-05-28 09:41:46 25439 \[Note\] InnoDB: 5.6.39 started; log sequence number 19620839567  
    
37. 2018-05-28 09:41:46 25439 \[Note\] Server hostname (bind-address): '\*'; port: 3306  
    
38. 2018-05-28 09:41:46 25439 \[Note\] IPv6 is available.  
    
39.   
    
40. \# 启动成功后，查看REDO日志的大小  
    
41. mysql> show global variables like '%innodb\_log\_file\_size%';  
    
42. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\-\-\-\-\-\+  
    
43. | Variable\_name | Value |  
    
44. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\-\-\-\-\-\+  
    
45. | innodb\_log\_file\_size | 2147483648 |  
    
46. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\-\-\-\-\-\+  
    
47. 1 row in set (0.01 sec)  
    
48.   
    
49. mysql> show global variables like '%innodb\_log\_files\_in\_group%';  
    
50. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\+  
    
51. | Variable\_name | Value |  
    
52. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\+  
    
53. | innodb\_log\_files\_in\_group | 5 |  
    
54. \+\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\+\-\-\-\-\-\-\-\+  
    
55. 1 row in set (0.01 sec)

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