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https://www.tsingfun.com/it/tech/896.html 

Android微信智能心跳方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...们拿着第一个方案和Ray讨论时,发现不能优雅应对Ray的所提问:1、测试环境的准确性,失败到底是因为网络的特性导致还是因为用户当前的环境变化导致的暂时失败。2、临界值界定,如果方案选中的心跳值是临界值,我们该...
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How to change the name of a Django app?

...e changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes). But now I get this error when I try to run python manage.py runserver ...
https://www.tsingfun.com/it/cpp/1364.html 

windows下捕获dump之Google breakpad_client的理解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...差,它在程序启动时就开启了一个“Handler thread”,等到crash,触发该线程去写dump,写完回调使用者,从google的久未更新的ClientDesign文档可以猜到以前是只进程内写dump的,它已经符合了让dump尽可能真实而设置下的规定。以...
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Can you give a Django app a verbose name for use throughout the admin?

...h to the appropriate AppConfig subclass to be configured explicitly in INSTALLED_APPS. Example: INSTALLED_APPS = [ # ...snip... 'yourapp.apps.YourAppConfig', ] Then alter your AppConfig as listed below. Django 1.7 As stated by rhunwicks' comment to OP, this is now possible out of the ...
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术

...INT messages. If an application processes a WM_PAINT message but does not call BeginPaint or otherwise clear the update region, the application continues to receive WM_PAINT messages as long as the region is not empty. In all cases, an application must clear the update region before returning from t...
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理会这茬儿,所以问题的序幕就这样拉开...
https://www.tsingfun.com/it/cpp/762.html 

Linux Shell中 if else及大于、小于、等于逻辑表达式写法 - C/C++ - 清泛网...

... "来表示条件测试。注意:if [ xxx ] 表达式前后都要空格。这里的空格很重要,笔者就曾因为空格缺少或位置不对,而浪费好多宝贵的时间。 格式: if ....; then .... elif ....; then .... else .... fi [ -f "somefile" ] :判断是...
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程序崩溃时malloc/new可能导致死锁,程序卡死退不出 - C/C++ - 清泛网 - 专...

...不可重入导致的。操作系统底层API行为可能不一致,可能办法指定 1、程序崩溃时malloc/new可能导致死锁,程序卡死退不出。Win、Linux下都会发生,应该是malloc系统函数的不可重入性导致的,函数中会加锁,当某个线程崩溃mallo...
https://www.tsingfun.com/it/bigdata_ai/957.html 

TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...比较: TokuMX,cacheSize设置为30G,开directio,内存使用完没cache的。 # free -g total used free shared buffers cached Mem: 31 31 0 0 0 0 -/+ buffers/cache: 30 0 Swap...
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7款在线思维导图制作网址及相关介绍 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...、基本的思维导图 (1) ImaginationCubed - 是一个在线画板,着令人叹为观止的界面、简单易用,Live风格。邀请你的搭档并分享你的画板、分享你的创意吧,你的每一步画笔都被记录下来并可回放! 功能: * live合作 * ...