ab

Apache server performance testing tool

Install

If the system is not installed, use the following command to install it

#Ubuntu
sudo apt-get install apache2-utils

#centos
yum install httpd-tools

Supplementary instructions

ab command is a tool for testing your Apache http server. You can use this tool to specify the number of requests sent to apache within a unit time to see how well your Apache and the machine work together.

grammar

ab [ -A auth-username:password ] [ -c concurrency ] [ -C cookie-name=value
] [ -d ] [ -e csv-file ] [ -g gnuplot-file ] [ -h ] [ -H custom-header ] [
-i ] [ -k ] [ -n requests ] [ -p POST-file ] [ -P proxy-auth-user‐
name:password ] [ -q ] [ -s ] [ -S ] [ -t timelimit ] [ -T content-type ]
[ -v verbosity] [ -V ] [ -w ] [ -x <table>-attributes ] [ -X proxy[:port]
] [ -y <tr>-attributes ] [ -z <td>-attributes ] [http://]host‐
name[:port]/path

Options

-A auth-username:password
       # Support basic authentication certificates, use "colon" between username and password:
       # Separated, ab will be sent in clear text. Regardless of whether the server needs it or not
       # , which means your server needs to support 401 authentication.

-c concurrency
       # The number of requests sent to the server at the same time. By default, only one http request is executed at a time.

-C cookie-name=value
       # Add a Cookie: line to the request. The argument is typically in the
       # form of a name=value pair. This field is repeatable.

-d # Do not display the "percentage served within XX [ms] table".
       # (legacy support).

-e csv-file
       # Write a Comma separated value (CSV) file which contains for each
       # percentage (from 1% to 100%) the time (in milli seconds) it took to
       # serve that percentage of the requests. This is usually more useful
       # than the 'gnuplot' file; as the results are already 'binned'.

-ggnuplot-file
       # Write all measured values out as a 'gnuplot' or TSV (Tab separate
       # values) file. This file can easily be imported into packages like
       # Gnuplot, IDL, Mathematica, Igor or even Excel. The labels are on
       # the first line of the file.
-h #Display usage instructions
-H custom-header
       #Append an additional header string to the request packet. This parameter should be a valid header line
       # line) form, usually use colon ":" to separate valid pairs (valid pairs) such as 'Accept-
       # Encoding: zip/zop;8 bit';

-i # Use an http header (HEAD) to replace the GET method. The POST method cannot be incorporated

-k # Allow http KeepAlive; that is to say, perform multiple requests in one http
       # In the session, it is not allowed by default, that is, no KeepAlive;)

-n requests
       # The number of requests issued when executing a test session. The default is to execute a single request.
       # Of course, such test results are meaningless.

-p POST-file
       # The test program, also known as ab, will send a request with HTTP POST to the Apache server.

-P proxy-auth-username:password
       # When you need to test an HTTP server through a proxy and your proxy
       # Username and password verification is also required, then you can use this option, the same
       #Use a colon ":" to separate the username and password, and ab will print them in plain text.
       #Send it out, of course, the premise is that your agent is in 407 authentication status

-q # When processing more than 150 requests, ab outputs a progress count
       # on stderr every 10% or 100 requests or so. The -q flag will sup‐
       # press these messages.

-s # When compiled in (ab -h will show you) use the SSL protected https
       # rather than the http protocol. This feature is experimental and
       # very rudimentary. You probably do not want to use it.

-S # Do not display the median and standard deviation values, nor dis‐
       # play the warning/error messages when the average and median are
       # more than one or two times the standard deviation apart. And de‐
       # fault to the min/avg/max values. (legacy support).

-t timelimit
       # Set the length of the test. Using this option ab will be set automatically.
       # The number of test request sessions is 50000, and then the time you set is
       # Fixed period. By default, there is no time limit, that is, until completion
       # Until the number of requests you set.

-T content-type
       # Content type header, used when POST data.

-v verbosity
       # Set the redundancy level, level 4 prints out the detailed information of each request header,
       # Level 3 prints out the response code (for example, 404,200), level 2 prints out warning information and instruction messages

-V # Display version number and exit
-w #Print the output results to an HTML table. The default table is two columns and n rows with a white background and a black box.

-x <table>-attributes
       # Use a string to describe the attributes of the table. The attribute string should be inserted into <table here>

-X proxy[:port]
       # Use a proxy server for the requests.

-y <tr>-attributes
       # Attribute name (<tr>) used to generate each row of the html table

-z <td>-attributes
       # Attribute name (<td>) used to generate each column of the html table

Parameters

Host: The host being tested.

Example

# 10 concurrency, 500 requests
ab -c 10 -n 500 https://www.qq.com/