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构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...对多核的支持不是太好，可以对多实例进行CPU绑定。
b、操作系统级别，
内核以及socket的优化，网络优化bond、文件系统、IO调度
innodb主要用在OLTP类应用，一般都是IO密集型的应用，在提高IO能力的基础上，充分利用cache机制。...
Compiling simple Hello World program on OS X via command line
I've got a simple hello world example that I'm trying to compile on OS X, named hw.cpp :
8 Answers
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How do I set environment variables from Java?
...e touching my environment?)
I think you've hit the nail on the head.
A possible way to ease the burden would be to factor out a method
void setUpEnvironment(ProcessBuilder builder) {
Map<String, String> env = builder.environment();
// blah blah
}
and pass any ProcessBuilders thro...
How to install Homebrew on OS X?
I'm trying to install Homebrew on OS X.
13 Answers
13
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Relative imports in Python 2.7
... name will be __main__. When a module is run as the top-level script, it loses its normal name and its name is instead __main__.
Accessing a module NOT through its containing package
There is an additional wrinkle: the module's name depends on whether it was imported "directly" from the directory...
Error executing command 'ant' on Mac OS X 10.9 Mavericks when building for Android with PhoneGap/Cor
Today I tried PhoneGap/Cordova with Mac OS X Mavericks . Building for iOS went just fine, but building for Android wasn't without some guesswork.
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?
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This is the most restrictive and safest way I've found, as explained here for hypothetical ~/my/web/root/ directory for your web content:
For each parent directory leading to your web root (e.g. ~/my, ~/my/web, ~/my/web/root):
chmod go...
Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)
I just upgraded my MacMini Server from Lion Server to Mountain Lion using OS X Server. I am having the same problem with PostgreSQL that I did last year when I first installed Lion Server.
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Is it possible to use Visual Studio on macOS?
I want to install Visual Studio on macOS. Is this possible?
7 Answers
7
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淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...列顺序执行，这样能减少同一台机器对数据库同一行记录操作的并发度，同时也能控制单个商品占用数据库连接的数量，防止热点商品占用太多数据库连接。
数据库层做排队。应用层只能做到单机排队，但应用机器数本身很...