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MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
...习更有效，那就先看一个MongoDB服务器的top命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
...习更有效，那就先看一个MongoDB服务器的top命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
...习更有效，那就先看一个MongoDB服务器的top命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
...
GitHub: searching through older versions of files
I know that using GitHub I can search through all the current versions of my files in a repo. However, I would also like to search through the older versions of my repo files. For example, say, I used to have a function called get_info() in my code, but deleted it several versions ago, is it possibl...
How to get datetime in JavaScript?
How to get date time in JavaScript with format 31/12/2010 03:55 AM?
7 Answers
7
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How do I remove the “extended attributes” on a file in Mac OS X?
I have an AppleScript script that runs a stress test. Part of the test is to open, save, and close certain files. Somehow, the files have picked up some "extended attributes" that prohibit the files from being saved. That causes the stress test to fail.
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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
...经过日志统计，前端系统双11峰值有效请求约60w以上的QPS ，而后端cache的集群峰值近2000w/s、单机也近30w/s，但到真正的写时流量要小很多了，当时最高下单减库存tps是红米创造，达到1500/s。
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秒杀系统设计的第一个原则...
How do I replace the *first instance* of a string in .NET?
I want to replace the first occurrence in a given string.
14 Answers
14
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iOS 7's blurred overlay effect using CSS?
It seems Apple's overlay is more than just a transparency. Any ideas on how to achieve this effect with CSS and possibly JS?
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
Is there any difference between :key => "value" (hashrocket) and key: "value" (Ruby 1.9) notations?
5 Answers
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