This article is translated from Niraj Bhatt performance Testing-response vs. Latency vs. Throughput vs. Load vs. Scalability vs. Stress vs. Stres S vs. robustness. Original address: https://nirajrules.wordpress.com/2009/09/17/ measuring-performance-response-vs-latency-vs-throughput-vs-load-vs-scalability-vs-stress-vs-robustness/Usually I find that when people talk about performance tests, they are always va
Website loading speed is the most important factor to determine the level of the site, worthy of special attention of stationmaster. The reason is simple, no one wants to open a Web page and so on long time, in other words, if your site is very slow to open, will churn out a large number of visitors, and even the effects of the multi-meter effect of the adverse effect. Before you dive into the code to try to improve your site's speed, determine what the real cause of the slow site access is. Thi
to let the participants fill in the psychological scale to measure the mental load level. We are currently using the software version of the NASA-TLX scale developed by NASA to measure the psychological load level of a user completing a test task. NASA-TLX Scale is one of the most widely used and effective psychological load
. For these services, network load balancing allows the network traffic to flow to one host, when the host fails, the communication volume is moved to another host.
Other references: Network Load Balancing Technology Overview
For large commercial websites, Server Load balancer instances are purchased for Hardware load
This article is about the PHP surface test seven of the nginx load balance How to configure, has a certain reference value, now share to everyone, the need for friends can refer to
Load Balancing
There are 4 modes of load Balancing in Nginx:
1), polling (default)Each request is assigned to a different back-end server
Label:Original address: http://www.cnblogs.com/chenxizhang/archive/2009/06/01/1493939.html In the original text see: http://msdn.microsoft.com/zh-cn/library/ms182600 (vs.80). aspx The results of the load test are stored in a SQL database. This SQL database is called the load test Results store. This database can be ei
To perform stress testing, the middleware uses WebLogic 816, the database version is 11.1.0.6 RAC, and the stress test tool is LoadRunner 8.0. Test the load on individual nodes of a single instance and RAC environment.
A multiple pool is configured on the WebLogic, and the concurrent equilibrium is divided into two nodes by using the
ASP optimization: Load Test Your ASP programIntroducedAs we move from the traditional CS-structured application to the current popular web-space program, we find ourselves trying to keep up with growing testability requirements and performance requirements. One of the biggest challenges is how to determine how many users your program can support. How do you face this challenge? Setting clear performance goa
you are going to publish an ASP program that is expected to be used by 1000 of users. You know clearly that your program can handle at least two concurrent users, because you and your partner can click on the ASP program all day without any problems. You are wondering whether two users can accurately reflect the compression capability of your program. Of course you can use standard test methods (publish your program and expect the best results), yet
FDA approves first hepatitis B viral Load TestAnother Roche first in TaqMan real-time PCR testing for the diagnostic labThe U.S. Food Drug Administration (FDA) have approved the Roche cobas TAQMANHBV Test, the first assay for Quantitatin G hepatitis B virus DNA approved in the U.S. The test uses Roche ' s real-time PCR technology to quantify the amount of hepati
With the increasing of traffic and the demanding of response speed, it is very important to carry out load balancing. The company's system was initially designed to take into account the planning of load Balancing, WWW static server configured Two, because the initial project time is tight, and the traffic is not high, so at that time only used one, the other in the net, just synchronized, and to play a uti
Use rest assured to make a load test article for your ASP program source: Internet Author: Edit and organize published on: 2008-06-02 add to QQ bookmarks
Introduction When we switch from a traditional CS-structured application to a popular web space program, we find that we are trying to keep up with the increasing demand for testability and performance. One of the biggest challenges is how
If you have been concerned about nginx, you must know what is the use of Nginx software, if your website access is increasing, a server has no way to withstand traffic pressure, then increase the number of servers to do the load bar. Do Web site load can buy hardware equipment to achieve, such as F5, but the price of hundreds of thousands of to millions, enough expensive, this article describes the Web site
If you have been concerned about nginx, you must know what is the use of Nginx software, if your website access is increasing, a server has no way to withstand traffic pressure, then increase the number of servers to do the load bar. Do Web site load can buy hardware equipment to achieve, such as F5, but the price of hundreds of thousands of to millions, enough expensive, this article describes the Web site
Page front page load performance test analysis of the feasibility scheme of each toolLevy on the various browsers and tools to do the test, the choice is the Baidu home test, because it is relatively single, no multi-layered nesting and continuous loading, minimizing other effects, the
JMeter implementing a simple Web load testBrief introductionApache JMeter is a Java -based stress testing tool developed by the Apache organization. For stress testing of software, it was originally designed for web application testing, but later extended to other test areas. It can be used to test static and dynamic resources such as static files, Java applets,
the test.
Plot
Suppose you are going to publish an ASP program that is expected to be used by 1000 of users. You know clearly that your program can handle at least two concurrent users, because you and your partner can click on the ASP program all day without any problems. You are wondering whether two users can accurately reflect the compression capability of your program. Of course you can use standard test
Oracle RAC Load Balancing enables client-initiated connections to be efficiently allocated to instances with smaller listener loads. There are two ways to achieve client load balancing, one is by configuring the client's load_balance, one by configuring the server-side Remote_listener parameters. Both approaches have advantages and disadvantages, and they are not mutually exclusive, so they can be combined
time slice interruption of the process. (In Linux 2.6, the system clock interrupts the clock frequency every 1 milliseconds, expressed in HZ macro, defined as 1000, that is, 1000 interrupts per second.) System is not the same, the kernel is not the same configuration 100, 250 have. )
The clock frequency of the kernel can be known by the following command
cat/boot/config-' Uname-r ' | grep ' ^config_hz= '
config_hz=100
The total number of clock interrupts per second is = number of CPUs * Number
If you have been paying attention to nginx, you must know what the nginx software is for. If your website traffic is getting higher and higher, one server can no longer withstand traffic pressure, let's increase the number of servers for load. Website load can be achieved by buying hardware devices, such as F5, but the price ranges from hundreds of thousands to millions, which is expensive. This article int
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