Web Stress test Tool Apache-ab _php Tutorial

Web Stress test Tool Apache-ab Explained

Many Web stress test tools are now charged, but Apache comes with a free stress test tool, the AB tool (command). Specifically, you can find a Ab.exe file in the bin directory under the root directory of Apache. Use it to roughly check how your program performs.

The specific usage is as follows, excerpt from the net. If there is any mistake, please correct me.

Format

AB [Options] [http://]hostname[:p Ort]/path

Parameters

-N requests number of requests to perform
The number of requests executed in the test session. By default, only one request is executed

-c concurrency number of multiple requests to make
The number of requests produced at one time. The default is one at a time.

-T TimeLimit Seconds to Max. Wait for responses
The maximum number of seconds the test takes. Its internal implied value is-n 50000. It allows you to limit the testing of the server to a fixed total time. By default, there is no time limit.

-P postfile File containing data to POST
A file that contains the data that needs to be post.

-T Content-type content-type header for POSTing
The Content-type header information used by the post data.

-V verbosity how much troubleshooting info to print
Setting the level of detail to display information-4 or greater displays header information, 3 or greater values can display response codes (404, 200, etc.), and 2 or greater values can display warnings and other information. -V Displays the version number and exits.

-W Print out results in HTML tables
Outputs the result in the format of an HTML table. By default, it is a table with a two-column width on a white background.

-I use HEAD instead of GET
Executes the head request instead of get.

-X attributes String to insert as table attributes
//

-Y attributes String to insert as TR attributes
//

-Z attributes String to insert as TD or TH attributes
//

-C attribute Add cookie, eg. ' Apache=1234. (repeatable)
-C Cookie-name=value attach a cookie to the request: line. Its typical form is a parameter pair of Name=value. This parameter can be repeated.

-H attribute Add arbitrary header line, eg. ' Accept-encoding:gzip '
Inserted after all normal header lines. (repeatable)

-A attribute Add Basic WWW authentication, the attributes
is a colon separated username and password.

-P attribute Add Basic Proxy authentication, the attributes
is a colon separated username and password.

-P Proxy-auth-username:password provides a Basic authentication trust to a transit agent. The user name and password are separated by a: and sent in Base64 encoded form. This string is sent regardless of whether the server is required (that is, if a 401 authentication requirement code is sent).

-X Proxy:port ProxyServer and port number to use
-V Print version number and exit
-K Use HTTP KeepAlive feature
-D do not show percentiles served table.
-S do not show confidence estimators and warnings.
-G filename Output collected data to gnuplot format file.
-e filename Output CSV file with percentages served
-H Display Usage information (this message)
-attributes the string that sets the property. There are various statically declared fixed-length buffers in the defect program. In addition, parsing of command-line arguments, the response headers of the server, and other external inputs can be very simple, which may have undesirable consequences. It does not realize the http/1.x completely; Accept only certain ' expected ' response formats. The frequent use of STRSTR (3) can lead to performance problems, that is, you may be testing the performance of AB rather than the server.
A lot of parameters, generally we use the-C and-n parameters can be. For example:
Open cmd and enter the following code.
CD C:\Apache2.2\bin
Ab-n 1000-c [Url]http://zf.guqin.com/index/index[/url]
This represents processing 100 requests at the same time and running the index.php file 1000 times. The following is the printed content.
This is apachebench, Version 2.0.41-dev < $Revision: 1.121.2.12 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus technology LTD, [Url]http://www.zeustech.net/[/url]
Copyright (c) 1998-2002 the Apache software Foundation, [Url]http://www.apache.org/[/url]
Benchmarking 127.0.0.1 (Be patient)
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Completed requests
Finished requests
Server software:apache/2.2.8
Platform Apache version 2.2.8
Server Hostname:zf.guqin.com
Server Host Name
Server port:80
Server port
Document Path:/index.php
Test the page document
Document length:1018 bytes
Document size
Concurrency level:1000
Concurrency number
Time taken for tests:8.188731 seconds
Duration of the entire test
Complete requests:1000
Number of requests completed
Failed requests:0
Number of failed requests
Write errors:0
Total transferred:1361581 bytes
Network traffic in the entire scene
HTML transferred:1055666 bytes
The amount of HTML content transferred throughout the scene
Requests per second:122.12 [#/sec] (mean)
One of the most concerned indicators, equivalent to the number of transactions per second in LR, followed by mean in parentheses indicates that this is an average
Time per request:8188.731 [MS] (mean)
Two of the most concerned indicators, equivalent to the average transaction response time in LR, followed by mean in parentheses indicates that this is an average
Time per request:8.189 [MS] (mean, across all concurrent requests)
Average of actual run time per request
Transfer rate:162.30 [Kbytes/sec] Received
Average traffic on the network per second can help eliminate the problem of extended response times due to excessive network traffic
Connection Times (MS)
Min MEAN[+/-SD] Median max
Connect:4 646 1078.7 89 3291
processing:165 992 493.1 938 4712
waiting:118 934 480.6 882 4554
total:813 1638 1338.9 1093 7785
The decomposition of time consumed on the network, the specific algorithm of each data is not very clear
Percentage of the requests served within a certain time (MS)
50% 1093
66% 1247
75% 1373
80% 1493
90% 4061
95% 4398
98% 5608
99% 7368
100% 7785 (Longest request)
The response of all requests in the entire scene. Each request in the scene has a response time, where 50% of the user's response time is less than 1093 milliseconds, 60% of the user response time is less than 1247 milliseconds, and the maximum response time is less than 7785 milliseconds
Because for concurrent requests, the CPU is not actually processed at the same time, but instead is rotated on a per-request basis, so basically the first time of the request is approximately equal to the second time per request multiplied by the number of concurrent requests.

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