dz数据库占用满载，慢日志显示dateline代码问题，求方法！

达达崩吧

   RT,Dz3.4,有时候cpu占用达到190%！导致论坛经常打不开!查询mysql慢日志代码如下！ 这个具体怎么解决，有没有老哥指点一下！

1. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
   
2. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 68983
   
3. # Query_time: 3.384782  Lock_time: 0.000089 Rows_sent: 10  Rows_examined: 622055
   
4. SET timestamp=1708522728;
   
5. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
   
6. # Time: 240221 21:38:49
   
7. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 68985
   
8. # Query_time: 3.091555  Lock_time: 0.000102 Rows_sent: 10  Rows_examined: 622055
   
9. SET timestamp=1708522729;
   
10. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
11. # Time: 240221 21:38:56
    
12. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69008
    
13. # Query_time: 3.325886  Lock_time: 0.000094 Rows_sent: 10  Rows_examined: 622055
    
14. SET timestamp=1708522736;
    
15. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
16. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69006
    
17. # Query_time: 3.421492  Lock_time: 0.000097 Rows_sent: 10  Rows_examined: 622055
    
18. SET timestamp=1708522736;
    
19. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
20. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69015
    
21. # Query_time: 3.344995  Lock_time: 0.000093 Rows_sent: 10  Rows_examined: 622055
    
22. SET timestamp=1708522736;
    
23. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
24. # Time: 240221 21:39:03
    
25. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69031
    
26. # Query_time: 5.658589  Lock_time: 0.000089 Rows_sent: 10  Rows_examined: 622055
    
27. SET timestamp=1708522743;
    
28. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
29. # Time: 240221 21:39:04
    
30. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69032
    
31. # Query_time: 6.080100  Lock_time: 0.000091 Rows_sent: 10  Rows_examined: 622055
    
32. SET timestamp=1708522744;
    
33. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
34. # Time: 240221 21:39:06
    
35. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69035
    
36. # Query_time: 7.060208  Lock_time: 0.000113 Rows_sent: 10  Rows_examined: 622055
    
37. SET timestamp=1708522746;
    
38. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
39. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69039
    
40. # Query_time: 7.022993  Lock_time: 0.000092 Rows_sent: 10  Rows_examined: 622055
    
41. SET timestamp=1708522746;
    
42. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
43. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69036
    
44. # Query_time: 7.054990  Lock_time: 0.000096 Rows_sent: 10  Rows_examined: 622055
    
45. SET timestamp=1708522746;
    
46. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
47. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69037
    
48. # Query_time: 7.103437  Lock_time: 0.000109 Rows_sent: 10  Rows_examined: 622055
    
49. SET timestamp=1708522746;
    
50. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
51. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69038
    
52. # Query_time: 7.090650  Lock_time: 0.000093 Rows_sent: 10  Rows_examined: 622055
    
53. SET timestamp=1708522746;
    
54. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
55. # Time: 240221 21:39:07
    
56. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69043
    
57. # Query_time: 7.351484  Lock_time: 0.000130 Rows_sent: 10  Rows_examined: 622055
    
58. SET timestamp=1708522747;
    
59. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
60. # Time: 240221 21:39:11
    
61. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69046
    
62. # Query_time: 7.439842  Lock_time: 0.000093 Rows_sent: 10  Rows_examined: 622055
    
63. SET timestamp=1708522751;
    
64. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
65. # Time: 240221 21:39:13
    
66. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69051
    
67. # Query_time: 7.495992  Lock_time: 0.000095 Rows_sent: 10  Rows_examined: 622055
    
68. SET timestamp=1708522753;
    
69. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
70. # Time: 240221 21:39:14
    
71. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69057
    
72. # Query_time: 7.341683  Lock_time: 0.000129 Rows_sent: 10  Rows_examined: 622055
    
73. SET timestamp=1708522754;
    
74. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
75. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69056
    
76. # Query_time: 7.348487  Lock_time: 0.000143 Rows_sent: 10  Rows_examined: 622055
    
77. SET timestamp=1708522754;
    
78. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
79. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69065
    
80. # Query_time: 7.135357  Lock_time: 0.000110 Rows_sent: 10  Rows_examined: 622055
    
81. SET timestamp=1708522754;
    
82. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
83. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69063
    
84. # Query_time: 7.170770  Lock_time: 0.000126 Rows_sent: 10  Rows_examined: 622055
    
85. SET timestamp=1708522754;
    
86. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
87. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69066
    
88. # Query_time: 7.211434  Lock_time: 0.000121 Rows_sent: 10  Rows_examined: 622055
    
89. SET timestamp=1708522754;
    
90. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
91. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69067
    
92. # Query_time: 7.217455  Lock_time: 0.000091 Rows_sent: 10  Rows_examined: 622055
    
93. SET timestamp=1708522754;
    
94. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;
    
95. # Time: 240221 21:39:15
    
96. # User@Host: www_xxxxx_co[www_xxxxx_co] @ localhost [127.0.0.1]  Id: 69073
    
97. # Query_time: 3.805129  Lock_time: 0.000100 Rows_sent: 10  Rows_examined: 622055
    
98. SET timestamp=1708522755;
    
99. SELECT * FROM pre_forum_thread WHERE FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE() and fid in(＇2＇) AND displayorder ＞=0 ORDER BY views DESC LIMIT 10;

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gpt给的优化建议是下面这个，如果正确的话，具体优化哪个文件夹呢?

1. 当CURDATE()转为索引字段时，MySQL无法直接利用dateline索引，而需要对全表的dateline列进行函数运算后才能做比较，查询效率低。
   
2. 
   
3. 如果dateline是以时间戳存储的，可以把条件改为 dateline = UNIX_TIMESTAMP(CURDATE())，这样可以避免全表转换。

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我知道答案 回答被采纳将会获得1 贡献 已有17人回答

达达崩吧

原贴不能编辑了，补充一下gpt的优化方案！这个dateline优化代码在哪个文件了呢？

1. 不要在WHERE条件中对字段进行函数操作。在你的SQL语句中，你使用了FROM_UNIXTIME(dateline, ＇%Y-%m-%d＇) = CURDATE()进行比较，由于需要对每一行的dateline执行FROM_UNIXTIME函数，这将导致索引无法使用，并需要全表扫描。建议将这部分修改为dateline >= UNIX_TIMESTAMP(CURDATE()) AND dateline < UNIX_TIMESTAMP(DATE_ADD(CURDATE(), INTERVAL 1 DAY))。

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mingkong

看看对应时间节点，是哪些脚本在运行。
或者通过慢查询的关键词来搜索源码
通过此类方法先找到慢查询的实际PHP脚本位置，再谈怎么优化和改造

达达崩吧

mingkong 发表于 2024-2-21 23:13
看看对应时间节点，是哪些脚本在运行。
或者通过慢查询的关键词来搜索源码
通过此类方法先找到慢查询的实际 ...

应该不是插件问题，应该还是源码问题，尝试过关掉所有插件，确实没有问题了，但是只要开启的插件调用这个数据表，就会出现慢日志记录！

mingkong

达达崩吧 发表于 2024-2-22 12:16
应该不是插件问题，应该还是源码问题，尝试过关掉所有插件，确实没有问题了，但是只要开启的插件调用这个 ...

如果关闭某个插件就正常了，那就从这个插件的代码入手。看看他如何查询这个数据表的。

达达崩吧

mingkong 发表于 2024-2-22 12:22
如果关闭某个插件就正常了，那就从这个插件的代码入手。看看他如何查询这个数据表的。 ...

好多插件涉及 pre_forum_thread 这个数据表都会出现在这个问题！连官方的插件也是。所以我推断不是插件代码的问题！

科站网

达达崩吧 发表于 2024-2-23 12:31
好多插件涉及 pre_forum_thread 这个数据表都会出现在这个问题！连官方的插件也是。所以我推断不是插件代 ...

你不能说插件有问题或者代码有问题，毕竟这是一个正常的sql，但是考虑使用场景
不是牵涉到pre_forum_thread就有问题，而是这个sql是否在合适的场景使用，比如你慢日志的sql，如果频繁的调用，那么就可能造成数据库的服务压力

打个通俗的比方：图书馆有10000本数（你的数据条目数），10个管理员（性能上限），每个人进图书馆都要查询下去年2月份买的书单，如果管理员没有每个月购书的目录，而书上面贴了购书时间，是不是得一本本看，100个人进来，是不是得排队

科站网

所以最好的是找到这段sql调用的地方，优化下，可以做缓存
继续用上面的比方，如果第一个人进来，查到书的目录，缓存下来，第二个人只要看缓存数据就行了，而不用从头查一次

达达崩吧

科站网 发表于 2024-2-23 13:25
所以最好的是找到这段sql调用的地方，优化下，可以做缓存
继续用上面的比方，如果第一个人进来，查到书的目 ...

缓存已经弄了，没啥效果，这段sql调用的我感觉就是dateline这里！但是不知道是哪个文件！

ink

pre_forum_thread 这个表是主题表，你后台暂时关闭了搜索功能试试。