It's probably possible to get Apache Bench working without installing the Apache executable, but you'd still need many things from that installation to get it up and working. The Overflow Blog. Podcast Making Agile work for data science.
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Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings. The interface is user-friendly and provides results within one minute of running the program. Apache Bench AB gets installed automatically within the Apache web server, or it can be installed separately as an Apache utility by the user.
Also, Apache Bench can be used with Asp. Application Life Cycle is the process of planning, designing, constructing, testing, and launching a product or service. Apache Bench is used for performing the Load Tests.
Load test is an important step for measuring the endurance of a web server for an application or website. Thus, a website or any project with a server should perform HTTP Load testing before launching its project. To download and install the Apache Bench on Windows, the binary zip file should be downloaded from one of the distributors below. To download and install the Apache Bench AB for windows, you should choose the correct binary zip version and modules for your load testing purposes and device.
In this example, you will see an Apache Bench installing process for Windows 64bit, from Apache Lounge. According to the output of the Apache Bench usage example, the time per request was MS, and The max spent time for connecting was MS, for processing, it was After logging into the VPS with another terminal, you can navigate to your application by typing the following code in the new terminal.
Lynx is a command line browser and is usually installed by default in various Linux distributions like Debian and Ubuntu. If you see the following output, it means your app is working fine. Please note that there is a bug in ab, and it is not able to test the application on the localhost. So we will change the host from localhost to You can observe how the various values of the ab outcome have changed as compared to the initial test. In the previous tests of ab, we have used the default web server bundled in the Bottle framework.
Now we will change the single-threaded default web server with a multi-threaded one. Therefore, let us install a multi-threaded web server library like cherrypy or gunicorn and tell Bottle to use it. Observe how the Requests per second increased from to It means gunicorn is suitable as a production server for python apps.
In this chapter, we will learn how to test multiple URLs concurrently. For that, we will need to edit our application file, app. You can do this by creating a shell script, with multiple ab calls. Create a file test. To avoid repetition and purpose of clarity, we will show only the relevant of the ab output, indicating by dots what portion has been omitted, as in the following.
You can save the Apache Bench Output to file by creating a shell script, with multiple ab calls. For example, our file test. You can check that the above script has created two files, test1. While using ab, you should be alert to the failed test without warning. For example, if you check a wrong URL, you may get something similar to the following we have deliberately changed the port here.
In this chapter, we will understand the preparation required for testing dynamic pages. A server-side dynamic web page is a web page the construction of which is controlled by an application server processing server-side scripts. The apache bench can only load test the server-side dynamic web page. In this section, we will describe the use of some important flags with the ab command.
We will use the terms, options and flags, interchangeably. The verbose option can be used to analyze and debug if there exist multiple number of failed requests. A common indication of failure of the load test is that the test finishes very fast and it gives a good number for request per second value. But it will be a wrong benchmark. Of course, if you are testing variable responses or returning non HTTP codes in the event of any error, you should simply ignore length checking with the -l option.
We will soon see non HTTP when we will launch a web2py application in the subsequent chapters. When the client sends HTTP request, the connection is made to the server, the server sends the response, and the connection is closed after it has sent the request.
This cycle continues with each request. However, with the keep-alive setting also known as persistent connections , the client maintains an underlying TCP connection open to facilitate multiple requests and response; this eliminates the slow and costly connection initialization time that would otherwise be present. If the web page is of variable length, then you should make use of the option -l.
Apache Bench does not report errors if the length of the responses is not constant. This can be useful for dynamic pages. How to force ab not to exit on receiving errors? You should use the option -r. Without this option, your test may break as soon as any request hits the socket error. However, with this option, errors will be reported in the failed errors heading, but the test will continue till the end.
This option is used to add arbitrary header line. The argument is typically in the form of a valid header line, containing a colon-separated field-value pair i. In the following section, we will learn in detail how to use the above options in combination with the option to use the cookie value, i. This field can be repeated. To understand how to use the cookie with Apache Bench, we need a web page that tries to set a cookie.
The rather heavy use of strstr 3 shows up top in profile, which might indicate a performance problem; i. Copyright The Apache Software Foundation.
Licensed under the Apache License, Version 2. The username and password are separated by a single : and sent on the wire base64 encoded. The string is sent regardless of whether the server needs it i. Default is one request at a time. This field is repeatable. This is usually more useful than the 'gnuplot' file; as the results are already 'binned'. The file is expected to contain the client certificate, followed by intermediate certificates, followed by the private key.
Available in 2. The labels are on the first line of the file.
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