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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
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接着使用strace跟踪了一下PHP脚本,发现进程卡在了recvfrom操作上:
shell> strace -f -r -p <PID>
recvfrom(<FD>,
通过如下命令查询recvfrom操作的含义:
shell> apropos recvfrom
receive a message from a socket
或者按照下面的方式确认一下:
shell...
Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio
What is the easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lion)?
12 Answ...
Benchmarking (python vs. c++ using BLAS) and (numpy)
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So what did the original poster do wrong? I wish he had commented on this post. Does he confirm that Numpy is as fast as C++?
– wmac
Jul 28 '15 at 10:50
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Upgrade Node.js to the latest version on Mac OS
Currently I am using Node.js v0.6.16 on Mac OS X 10.7.4. Now I want to upgrade it to the latest Node.js v0.8.1. But after downloading and installing the latest package file from nodejs.org, I found that system is still using v0.6.16 instead of v0.8.1 when I typed "node -v" in a terminal. Is there an...
Use C++ with Cocoa Instead of Objective-C?
...to be pretty vanilla in its implementation on Linux and Windows but on Mac OS X it seems like additional Apple specific pieces of code are required (like an Obj-C wrapper). It also seems that Apple is forcing developers to write in Objective-C rather than C++, although I could be wrong.
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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rep命令。一方面这很被动。另一方面,效率非常低,数次操作下来,程序员的心情也会变糟(我还要去维护宇宙和平的好嘛)。
这篇文章讲的就是如何解决分布式系统的日志管理问题。先给大家看看最终的效果:
单个屏幕上...
Pinging servers in Python
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This function works in any OS (Unix, Linux, macOS, and Windows)
Python 2 and Python 3
EDITS:
By @radato os.system was replaced by subprocess.call. This avoids shell injection vulnerability in cases where your hostname string might not be validated.
i...
JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区,...
...没有优先级的就等待执行。这三种算法都有优缺点,实际操作系统是结合多种算法,保证优先级的能够先处理,但是也不能一直处理优先级的任务。硬件方面为了提高效率也有多核cpu、多线程cpu等解决方案。目前看得出来线程增...
How do I use JDK 7 on Mac OSX?
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Oracle has released JDK 7 for OS X.
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How to open the default webbrowser using java
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is this a cross-platform solution or Windows only? other answers in this thread suggest to use the Runtime class for Linux
– isapir
Oct 23 '13 at 4:05
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