PHP Redis基于TP5.1框架实现互斥锁

苗先生的PHP记录发布时间：2022-07-11 17:35:37 ，浏览量：0

互斥锁常见使用场景: 缓存穿透

看下面这两个用户其实都请求了数据库,假设用户量大,会导致大量请求打到数据库导致宕机

用户A 查询缓存没有缓存请求数据库添加缓存并设置过期时间

用户B 查询缓存没有缓存请求数据库添加缓存并设置过期时间

我的这个demo是苹果授权的服务层代码 , 这里获取的数据是可以重复使用的,但是所有用户都请求会浪费服务器资源,所以添加一个互斥锁减少服务器的消耗


    
        
        
        
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查询信息 : 18 queries 0 writes 
文件加载 : 36
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	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/ThinkPHP/Common/functions.php 第 1239 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 34 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 134 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 134 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 135 行.
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[8] Undefined variable: top_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 179 行.
    
    
        
    
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