rss

Linux监控工具介绍系列——smem

强颜欢笑 提交于 2019-11-27 09:02:16
smem工具介绍 smem是Linux系统上的一款可以生成多种内存耗用报告的命令行工具。与现有工具不一样的是smem可以报告实际使用的物理内存(PSS),这是一种更有意义的指标。可以衡量虚拟内存系统的库和应用程序所占用的内存数量。 由于大部分的物理内存通常在多个应用程序之间共享,名为实际使用物理内存(RSS)的这个标准的内存耗用衡量指标会大大高估内存耗用情况。PSS这个参数而是衡量了每个应用程序在每个共享内存区中的“公平分配”,给出了一个切合实际的衡量指标。 smem有许多功能特性: 系统概况列表 按进程、映射和用户列表 按用户、映射或用户过滤 来自多个数据源的可配置列 可配置的输出单位和百分比 可配置的标题和总和 从/proc读取活动数据 从目录镜像或经过压缩的打包文件读取数据快照 面向嵌入式系统的轻型捕获工具 内置的图表生成功能 smem的系统要求 系统内核为2.6.27以上 Python版本必须为2.4或以上 依赖matplotlib库生成图表(可选的,自动检测)依赖matplotlib,是因为smem除了一般的文本信息报告外,smem 也可以生成条状或饼状图。 对应的英文原文如下: smem is a tool that can give numerous reports on memory usage on Linux systems. Unlike existing

XML

本秂侑毒 提交于 2019-11-27 08:15:36
进入新浪博客点击订阅后会提示订阅地址为 XML 格式的地址,如图 博客地址 http: //blog .sina.com.cn /u/3980770831 XML 地址内容,如图 XML 地址: http: //blog .sina.com.cn /rss/3980770831 .xml 创建一个项目: $ scrapy startproject blogxml 填写 item 需要定义的存储数据: import scrapy class BlogxmlItem(scrapy.Item): # 存储标题 title = scrapy.Field() # 存储对应连接 link = scrapy.Field() # 存储对应文章作者 author = scrapy.Field() 创建一个 xml 模板: $ cd blogxml $ scrapy genspider - l $ scrapy genspider - t xmlfeed blogxmlspider sina.com.cn 打开创建的 blogxmlspider.py 文件更改代码: # -*- coding: utf-8 -*- from scrapy.spiders import XMLFeedSpider from blogxml.items import BlogxmlItem class

RSS feed: how to recommend an update interval?

青春壹個敷衍的年華 提交于 2019-11-27 06:52:28
问题 When publishing an RSS feed, is there some attribute in the XML that can be used to recommend the update interval/frequency? And if its not part of the standard, is there some generally recognised way? 回答1: The specification here http://www.rssboard.org/rss-specification#requiredChannelElements has these optional parameters specified for the channel element: These to tell clients when they don't need to update.. skipHours - A hint for aggregators telling them which hours they can skip. This

Prevent Google Feed API from using cached feed

北慕城南 提交于 2019-11-27 06:47:44
问题 I am using the Google Feed JSAPI to read/parse a feed. The problem is, when the feed changes, the previous entries become invalid (links and images don't work) so I cannot load a cached version of the feed. I thought there would be an option when loading the feed to not use the cached version but I don't see one. My solution is to do add in a variable (t) to the end of the feed url so it is "unique" but this seems hacky (but it works). Anyone know of a better way to do it? function onLoad() {

How can I get started making a C# RSS Reader?

柔情痞子 提交于 2019-11-27 06:07:38
I have been wanting to make a RSS reader for a while now (just for fun), but I don't have the slightest idea of where to start. I don't understand anything about RSS. Are there any good tutorials on RSS and how to implement it in an application (not a tutorial on how to make a RSS reader, that would be too easy). Brian See http://msdn.microsoft.com/en-us/library/bb943474.aspx http://msdn.microsoft.com/en-us/library/system.servicemodel.syndication.syndicationfeed.aspx http://msdn.microsoft.com/en-us/library/bb943480.aspx Basically there is a lot of stuff in the .Net 3.5 framework that does the

PHP's SimpleXML: How to use colons in names

只愿长相守 提交于 2019-11-27 04:37:38
问题 I am trying to generate an RSS Google Merchant, using SimpleXML. The sample given by Google is: <?xml version="1.0"?> <rss version="2.0" xmlns:g="http://base.google.com/ns/1.0"> <channel> <title>The name of your data feed</title> <link>http://www.example.com</link> <description>A description of your content</description> <item> <title>Red wool sweater</title> <link> http://www.example.com/item1-info-page.html</link> <description>Comfortable and soft, this sweater will keep you warm on those

What RSS parser should I use in PHP?

跟風遠走 提交于 2019-11-27 04:07:41
问题 I am searching an RSS parser written in PHP. The problem is not that I cannot find one. The problem is that there are too many and it's hard to decide which one to use (especially when I have no experience with them and to try them is too time consuming). Can anybody recommend me a "good" RSS parser? The following requirements are important to me (given in order of importance): It's able to extract all information given in the feed (not only title, description and link but everything what is

How large RSS reader works (netvibes, Google reader…)

余生颓废 提交于 2019-11-27 04:02:31
问题 I wonder how web applications like Google Reader, Blogline, techronati works, and what technics they follow to parse millions of RSS feeds using cron job at one time? 回答1: There is a lot of different techniques... the "worst" one being the one that you describe. (time based polling). The first thing you need to consider is that they may not all do the parsing on the server side. For example, I know that Netvibes was doing the parsing on the client side (but cached the content on the server),

Parsing XML feed die with “Element is already used”

折月煮酒 提交于 2019-11-27 03:51:31
问题 I'm trying to parse an XML feed using SimpleXML in Android: http://backend.deviantart.com/rss.xml?type=deviation&q=by%3Aspyed+sort%3Atime+meta%3Aall Sample here: <?xml version="1.0" encoding="UTF-8"?> <rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:creativeCommons="http://backend.userland.com/creativeCommonsRssModule" xmlns:media="http://search.yahoo.com/mrss/" version="2.0"> <channel> <title>DeviantArt: spyed's</title> <link>http://www.deviantart.com/?order=5&q=by%3Aspyed</link>