Performance bottlenecks:Slow, write faster than read The main performance indicators:Frequency of visits,The number of concurrent connections,Cache Hit Ratio,Index use,Slow log opening and analysis,Query log, querying logThreads_cached: Whether the connection thread cache is turned onThread_cache_size: The size of the number of thread cachesQuery_cache_size: Query Cache SizeJoin_buffer_size:join Buffer SizeSize of tmp_table_size:tmp table (> 16M)Max_h
IntroductionThis article is the second article in the Java Performance Analysis tool series, the first article: Operating system Tools. In this article, you will learn more about Java applications and the JVM itself using built-in Java monitoring tools. There are many built-in tools in the JDK, including:
Jcmd
Reveal UI analysis tools are simple to use and revealui analysis tools
Official website (30 days free trial): http://revealapp.com/
Purpose:
In iOS development, we sometimes hope to have a UI Debug tool similar to Web development (for example, Firebug), so that we can view the UI structure in real time, you can also c
Java performance analysis tools, Part 1: Operating System Tools, java operating systemsIntroduction
The premise of performance analysis is that the running status of the application and the running environment of the application are displayed more directly in a visual manner. How can we achieve this visual display? We
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
In SEO tools, we recommend Google website traffic statistics tools.
This traffic analysis tool is very powerful.
We will analyze each function block to help you maximize its value, not just to view traffic and keywords. The most important thing is to give you the minimum time to understand this tool.
"ConsoleOn the left-side navigation pane:
Console:
The homepage
Installing PHP xdebug Debugging tools and performance analysis tools Webgrind for WindowsFirst step : view information such as PHP versionPhpinfo ();above is x86 NTS VC14Step two : download xdebugofficial website https://xdebug.org/Step three :download Extension , add php /ext Extension directoryFourth Step : php.ini Open ExtensionTo configure additional option
dialog box.Modify Network Request ContentSometimes in order to debug the server interface, we need to repeatedly try different parameters of the network request. Charles makes it easy to provide modification and re-sending of network requests. Simply right-click on a previous network request and select "Edit" to create an editable network request. As shown below:We can modify any information about the request, including the URL address, port, parameters, etc., and then click "Execute" to send t
Excerpt from: http://www.oschina.net/question/129540_23043 analysis and comparison of common Java static code analysis toolsIntroduction: This article first introduced the static Code Analysis basic concept and the main technology, then introduced the existing 4 kinds of mainstream Java static Code analysis tool (Check
modification and re-sending of network requests. Simply right-click on a previous network request and select "Edit" to create an editable network request. As shown below:We can modify any information about the request, including the URL address, port, parameters, etc., and then click "Execute" to send the modified network request (as shown). Charles supports us in modifying and sending this request several times, which is very convenient for us and the server-side debugging interface.SummarizeW
box.Modify Network Request ContentSometimes in order to debug the server interface, we need to repeatedly try different parameters of the network request. Charles makes it easy to provide modification and re-sending of network requests. Simply right-click on a previous network request and select "Edit" to create an editable network request. As shown below:We can modify any information about the request, including the URL address, port, parameters, etc., and then click "Execute" to send the modi
Confirmation menu (as shown), click "Allow" to complete the setup.Intercepting SSL InformationCharles does not intercept SSL by default, and if you want to intercept all SSL network requests on a Web site, you can right-click on the request and select SSL Proxy, as shown in:In this way, all SSL requests for the host can be intercepted.6. Analog Network Slow speedWhen it comes to iphone development, we often need to simulate a slow network or a high-latency network to test whether the applicatio
current scope. This is why big data is defined in 4 ways: Volume (volume), Variety (variety), Velocity (efficiency), and veracity (value), or 4V of big data. The following outlines each feature and the challenges it faces: 1. Volume Volume is talking about the amount of data a business has to capture, store, and access, producing 90% of all the world's data in just the last two years. Today's institutions are completely overwhelmed by the volume of data, easily producing terabytes or even petab
Introduction
This article first introduces the basic concepts and main technologies of static code analysis, and then introduces four existing mainstream Java static code analysis tools (Checkstyle, findbugs, PMD, jtestIn the end, they are analyzed and compared in terms of functions and features, hoping to help Java software developers understand static code
feature, so a prolonged pause can cause the client's request to time out.SummarizeWith Charles Software, we can easily intercept and debug network request content, analyze packet protocols, and emulate slow networks in daily development. With good Charles, we can greatly facilitate the development and commissioning of apps with Web requests.SummarizeWith Charles Software, we can easily intercept and debug network request content, analyze packet protocols, and emulate slow networks in daily deve
I have learned 264 for more than three months. I have been studying old books and reading jm86 many times.CodeRecently, we found two major analysis tools: visa and elecard streameye. I can't help but sigh, hate at the same time.
To put it simply, the two software:
264 visa
Powerful h264 real-time analysis tool that can analyze h264 resources in various scenari
product development process. In this article, we'll show you how to use Visual studio®team System development Edition or VisualStudio Team Suite to identify performance bottlenecks in your application. You will be introduced to the Visual Studio parser by walkthrough a sample performance Survey. Note that although we are using C # in this article to write code examples, most of the examples here are equally valid for native C + + and Visual Basic® code.
Application Analytics
We will use the pa
It is recently necessary to convert files in PNM format into GIF files in bulk. I have tried the following image conversion tools:Imagebatch: Completely free, but only supports PNG JPEG BMP gif four formatofficeconverter: Online conversion software, supporting the conversion of all image formats, a large number of image processing needs to pay a certain fee, otherwise inefficientpixillion: Support for all formats, the trial version only supports up to 5 files for a set of batch processing, 100 t
Enable slow log
There are two activation methods:
1. In my. cnf, log-slow-queries [= file_name]2. When the mysqld process is started, specify the five common tools to be compared using the -- log-slow-queries [= file_name] Option.
Mysqldumpslow, mysqlsla, myprofi, mysql-explain-slow-log, mysqllogfilterMysqldumpslow is a log analysis tool for slow query officially provided by mysql. the output chart is as f
Mysqlslowlog is a log tool used to record SQL statements that have been executed for a long time (beyond long_query_time seconds) to enable slow log.
There are two ways to enable: 1, in my. in cnf, log-slow-queries [= file_name] 2 is used to specify the five commonly used tools compared by the -- log-slow-queries [= file_name] option when the mysqld process is started.
Mysqldumpslow, mysqlsla, myprofi, mysql-explain-slow-log, mysqllogfilter
Mysqldumps
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