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A basic knowledge1.1 What is performanceBefore performance tuning, let's start by understanding what performance is. With regard to performance, I think everyone who has studied Java can list a few points and even talk about it. In the Java TM Platform performance, the follo
Lao Li case sharing: WebLogic performance optimization casePoptest's Test technology QQ Group: 450192312Website application Home size around 130K, in the previous test process, its hundred users of the average response capacity of 6.5 seconds, performance optimization after two seconds, the results in 5 seconds:First, operating system:Machine name CPU memory Soft
Do you need to have a detailed analysis of key performance factors that allow you to control and tune DB2 UDB and DB2 applications? Or have you ever had a problem with a DB2 server, but you can't detect the cause of the problem in the current snapshot, and you want to have historical monitoring data?
DB2 Performance Expert V2.1 is a tool that can help you accomplish the above tasks. The 1th part of this ar
Outline:
I. Overview
2. What is performance tuning? (What)
3. Why performance optimization? (Why)
4. When do I need performance optimization? (When)
5. Where do I need performance tuning? (Where)
6. Who will perform
JavaScript is a relatively complete front-end development language, in today's web development applications are very wide, especially for Web 2.0 applications. As Web 2.0 becomes more and more popular today, we will find that there will be a lot of JavaScript code in our Web application projects, and that there will be more and more in the future. JavaScript, as a language to interpret execution, and its single-threaded mechanism, determines that performance
Build high performanceASP. NETSite Chapter 5-Performance Tuning Overview (Part 1)
This article describes how to use some simple tools to analyze some data related to site performance.ArticleWe have discussed the general process of Performance Tuning. This article will introduce some methods and tools to help you get
Article Source: http://www.cnblogs.com/dingjie08/archive/2009/11/10/1599929.htmlObjectiveRecently help friends to run the platform for Performance tuning, the effect is good, so write it out together to exchange. If the article has you feel wrong, or do not understand, please add QQ Group: 4656272, Welcome to correct and discuss together. (PS: Vulgar Humanities pen is poor, crossing please more magnanimous)
statements. Using adbc in the abap environment is similar to using JDBC in the Java environment.
The reports and transactions they write can use any available interface to access the database.
Use DB2 parameters in SAP Open SQL
SAP supports a batch of DB2 parameters that can be added to Open SQL statements to affect how natural SQL statements generated from Open SQL are compiled and run at the database layer. Customers can use these DB2 parameters in their own reports and transactions to improv
: This article mainly introduces the Nginx performance tuning course for performance testing. if you are interested in the PHP Tutorial, please refer to it. Performance testing-performance tuning of Nginx
Course viewing address:
1:CPU architecture and how it works 2: Operating Systems and processes
3: Metrics to measure CPU busy
4:CPU resources as a symptom of system performance bottlenecks
5: Which processes are the big players that consume CPU resources?
6: Using the SAR tool to analyze CPU utilization
7: Analyze the running process queue length with the SAR tool
8: Analyzing system calls with SAR tools
9: Test the execution efficiency of a command and program with the time
MySQL performance tuning and Architecture Design-Chapter 1 Performance Design-MySQL Replication and replication Optimization
Chapter 1 scalability design-MySQL Replication
Preface:
MySQL Replication is a unique feature of MySQL. It can completely copy data from one MySQL Server Instance to another MySQL Server Instance. Although the replication process is not imp
amount of data written to the block device (that is, write disk, Unit kb/sec)The Bi+bo reference value set here is 1000, if more than 1000, and the WA value is larger, it represents the system disk IO performance bottleneck.5) SystemThe a.in column represents the number of device interrupts per second observed in a time interval;The B.cs column represents the number of context switches produced per second.The higher these two values are, the more CPU
: Select the level of detail for your monitoring information, which is the most detailed level by default, and you can monitor all methods including the internal framework.Chart Performance Counters: Select the performance-related information you need to collect, such as CPU, number of threads, IO, memory, and even. NET garbage collection generations of information.Additional Profiler Options: Additional co
This article describes how to use some simple tools to analyze some data related to site performance. In the previous article, we discussed the general process of performance tuning, this article introduces some methods and tools to help you get started quickly.
The topics in this chapter are as follows:
General performanc
IOS Performance Tuning series: Use Time Profiler to discover performance bottlenecks and tune profiler
Hardware wide: The fifth article in the IOS Performance Tuning series, which is expected to be updated continuously over 20 articles.
The last four articles focus on memory
Performance Tuning overview:
I. Overview
2. what is performance tuning? (What)
3. Why performance optimization? (Why)
4. When do I need performance optimization? (When)
5. where do I need per
In our web project, our common Web application servers are tomcat, Weblogic, and WebSphere. They are infrastructure software for Internet applications, also called "middleware," which handles dynamic on-page requests, provides names, transactions, security, messaging, data access, and so on, and provides the development, deployment, operation, and management capabilities that should be built.How do we better monitor and diagnose
range. That doesn't make sense either.
For performance testing, we also need to define a time period. For example, it lasts 15 minutes on a certain throughput. Because the system becomes unstable when the load arrives, the system will stabilize after a two-minute time. In addition, it is possible that your system behaves normally in the first few minutes of the load, and then it is unstable and even collapsed. So it takes so long. This value, we
The topics in this chapter are as follows:
General performance tuning process
Analyze page loading information using analysis tools
Analyze performance bottlenecks using analysis tools
General performance tuning process
Before solving the
browser rendering, so you should also reduce unnecessary operationsSwitch4 Bulk Modifying the DOM removes the element from the document stream, applies multiple changes to it, and brings the element back to the documentThis minimizes redrawing and re-typesetting,Specific methods:1 hide the element, make the changes, and then display it.2 Copy the original element into a node that is out of the document, modify the copy, and overwrite the original element.5 Reducing IFRAMEthe IFRAME consumes a
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