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https://www.tsingfun.com/it/bigdata_ai/1075.html 

记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

... mongod like this to avoid performance problems: numactl –interleave=all mongod [other options] 当时我并不太清楚NUMA是什么东西,所以没有处理,只是把问题反馈给了运维人员,后来知道运维人员也没有理会这茬儿,所以问题序幕就这样拉开...
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原子vector一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术

原子vector一种实现源码(atomic-vector)atomic-vector来自Facebook一种实现,源码如下: * +----------------------------------------------------------------------+ | HipHop for PHP 来自Facebook一种实现,源码如下: /* +--------------------...
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php中json_decode()和json_encode()使用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... echo "Unicode: ", json_encode($a, JSON_UNESCAPED_UNICODE), "\n"; echo "All: ", json_encode($a, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP | JSON_UNESCAPED_UNICODE), "\n\n"; $b = array(); echo "Empty array output as array: ", json_encode($b), "\n"; echo "Empty array out...
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设置用户默认权限 Umask命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...22 = 644 注:权限计算实际上是二进制位与操作,参考All About the umask and Permissions。 操作bar.tar shell> tar xf bar.tar 这次有点不同,我们要运行两次tar命令。 第一次:以root身份运行tar命令,然后查看目录和文件权限,分别...
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[since C++11] std::array使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...y<char> as a fix sized c-string. array<char, 100> str = {0}; // all elements initialized with 0. char *p = str.data(); strcpy(p, "hello world"); printf("%s\n", p); // hello world END_TEST; 上面这个例子让我想起了std::string, 它有一个c_str()方法,...
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How to convert a string to utf-8 in Python

..."utf-8") ^ Converting to unicode and specifying the encoding. In Python 3 All strings are unicode. The unicode function does not exist anymore. See answer from @Noumenon share | improve this answer...
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win7 安装项目管理工具redmine2.5.1 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...要开始这项工作。 一、了解redmine 参考redmine官方Installtion Guide,主要是对redmine有个大致了解。 http://www.redmine.org/projects/redmine/wiki/RedmineInstall 二、下载必要软件包 我用是以下版本: redmine-2.5.1.zip railsinstaller-2....
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std::vector find查找方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...= vecTest.end(); 注意:.begin(),.end()一定不要忘记了后面括号,否则报如下错误: error C3867: “std::vector<_Ty>::end”: 函数调用缺少参数列表;请使用“&std::vector<_Ty>::end”创建指向成员指针vector find
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VC IP地址控件(CIPAddressCtrl )自绘 - C/C++ - 清泛网 - 专注C/C++及内核技术

VC IP地址控件(CIPAddressCtrl )自绘先看效果图:代码:.h#pragma once class CMyIPCtrl : public CIPAddressCtrl{DECLARE_DYNAMIC(CMyIPCtrl)public:CMyIPCtrl();virtua...先看效果图: 代码: .h #pragma once class CMyIPCtrl : public CIPAddressCtrl { DECLARE_DYNAMI...
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OpenSuSE 安装dtrace - 操作系统(内核) - 清泛网 - 专注IT技能提升

...官网:https: software opensuse org搜索 dtrace,选择:找到指定版本ymp文件,这里以15 1为例:OCICLI https: software opensuse org ymp home:Dead_Mozay:gst openSUSE_Leap_15 1 systemtap-dtrace ymp--End--官网:https://software.opensuse.org 搜索 dtrace,选择: 找到...