netflow analysis tools

Source: Http://www.csdn.net/article/2012-11-23/2812174-5-Good-and-useful-.NET-ProfilersAlthough. The NET Framework claims to never have a memory leak because of the introduction of a memory-recycling mechanism. In practice, however, we often assign objects without releasing a reference to the object, causing the object to never be freed. The most common scenario is to add an event handler to an object, but it is not removed from the object's event handler when the object is no longer being used.

Common performance analysis tools. 1. vmstat commandVmstat is short for Virtual Meomory Statistics (Virtual Memory Statistics). This command tool is installed by default in many linux releases, the vmstat command can be used to monitor the memory information, Process status, and CPU activity of the operating system. The disadvantage is that a process cannot be deeply analyzed.The vmstat syntax is as follows

Site more than a year did not make any big changes, repeat the same thing every day: update, promotion, slowly the site has a certain weight, and finally, although the weight of the homepage came up, but did not import more traffic. Then from the Mouchangqing Teacher's blog to learn from his promotion is very focused on data analysis, from this and the letter also began to analyze my website through tools a

During application maintenance for the customer, I noticed some performance problems under high load conditions. Theoretically, increasing the load on the application will reduce the performance, but I think the performance drop rate is much higher than the load increase. At the same time, I also found that, performance can be improved by changing the logic of the application. To learn more about this, we need to perform some performance analysis. At

Analysis of Android source code (ii)--ubuntu root,git,vmware Tools, installation Input method, theme beautification, Dock, installation JDK and configuration environment Next, on the film is mainly introduced some of the installation tools of the small knowledge Point Android source Analysis (a)--vmware Workst

use a rule system that is separate from code and implement fuzzy logic Reasoning). Because Gameplaykit is independent of the advanced game engine in iOS and OS X systems, you can integrate it with any technology that can do a full game, such as Spritekit for 2D games, Scenekit for 3D games, or using metal/ OpenGL ES Custom third-party game engine. For games with low quality requirements, you can even create games directly from Gameplaykit and (iOS) Uikit or (OS x) appkit. PS: The above text is

Below is a list of some tools that can help you examine your Java source code for potential problems: 1. pMD from http://pmd.sourceforge.net/ License: PMD is licensed under a "BSD-style" License PMD scans Java source code and looks for potential problems like: * Possible bugs-Empty try/catch/finally/switch statements* Dead Code-unused local variables, parameters and private methods* Suboptimal code-Wasteful string/stringbuffer usage* Overcompl

used to Webmaster query tool in the keyword mining, in fact, this query results and Baidu Index related search results are similar, Just eliminates the need for each to query the natural flow of the annoying lock. For example, I want to dig Taobao women's long tail keyword, then you can through Webmaster Tools Baidu Index Analysis (in fact, is the key word mining) to search, as shown: 　　 As a

. "Keyword optimization analysis" allows you to understand your choice of keyword optimization of the difficulty, the first 50 have how many home page to do this keyword, ranked in the Baidu home page site situation, let you understand the word optimization difficulty. "Dead chain detection" can detect how many dead chain site, the site does not pay attention to the dead chain, was K also do not know what happened. Disadvantages: Mainly for Baidu sea

How to use Jconsole to observe and analyze the operation of Java program, and to perform debugging and tuninghttp://jiajun.iteye.com/blog/810150How to use JVISUALVM for performance analysishttp://jiajun.iteye.com/blog/1180230Full-featured Java Profiling tool (Profiler)Http://www.blogjava.net/mrzhangshunli/archive/2007/08/27/140088.htmlHttp://www.cnblogs.com/jayzee/p/3184087.htmlVisualVM Getting Started GuideHttp://visualvm.java.net/zh_CN/gettingstarted.htmlRemote monitoring JVM--VISUALVMhttp://w

PandasPandas is the most powerful data analysis and exploration tool under Python. It contains advanced data structures and ingenious tools that make it fast and easy to work with data in Python. Pandas is built on top of NumPy, making numpy-centric applications easy to use. Pandas is very powerful and supports SQL-like data enhancement, deletion, checking, and modification, with rich data processing functi

In the previous section, we crawled nearly 70 thousand pieces of second-hand house data using crawler tools. This section pre-processes the data, that is, the so-called ETL (extract-transform-load) I. Necessity of ETL tools Data cleansing is a prerequisite for data analysis. No matter how high the algorithm is, when an error data is encountered, an exception is

Introduction to performance analysis and tuning tools There is always a time when you want to improve the efficiency of your program, to see which part takes longer to become a bottleneck, and to know the memory and CPU usage when the program runs. At this point you will need some way to perform performance analysis and tuning of the program. by Context Manager A

Use protocol analysis tools to learn TCP/IP I. Preface At present, the speed of network development is very fast, and more people are learning the network. People with a little knowledge about the network know that the TCP/IP protocol is the basis of the network and the language of the Internet, it can be said that there is no Internet today without the TCP/IP protocol. At present, there are a lot of people

Linux program analysis tools: ldd and nm Ldd and nm are two very practical program analysis tools in Linux. Among them, ldd is used to analyze the dynamic link library that the program depends on when running, and nm is used to view the symbol table information in the specified program.1 ldd Format: ldd [options] file

instance. Org.rosenjiang.bo.Pilot class headlines, was instantiated 290,325 times, and then returned to see the program, I admit it was deliberately done. There are a number of useful reports that can be used to assist in analyzing problems, but the examples in this article are too simple to use.To learn more about the function of mat, give some examples (do not provide the corresponding code):Example two:When the heap dump problem is discovered through mat, you need to look for the code point

In the process of developing Java programs, it is unavoidable to encounter problems such as memory usage, performance bottleneck and so on. The Java Profiler Tool helps developers locate these issues quickly and efficiently, making it an important tool in the Java development process. At present, there are a variety of Java Profiler tools in the market, this article will briefly introduce several kinds of tools