Does ab on apache need to be installed?

ab is Apache's own website stress testing tool. It is very simple and convenient to use. It can not only perform website access stress testing on Apache servers, but also on other types of servers. For stress testing, such as nginx, tomcat, IIS, etc., you caninstall as needed.

1: Installation

The first step is to download and install it.
Here we only talk about downloading and installing under window
Official download address:, (https://www.apachehaus.com/cgi-bin/download.plx)

After the download is completed, unzip it
I will unzip it directly to apacheab on the d drive
Modify the port configuration of the conf/httpd.conf file in the root directory of the decompression, the default is Port 80 should be occupied and cannot be installed. You can change it to another one by yourself. I changed it here to port 8088.

Extract the file to a local folder. If it is not unzipped in c drive, you need to set parameters:

I decompressed it to the D drive, and you need to set parameters. Open conf->httpd.conf with a text editor.

There are three places that need to be modified:

Start testing

If you need to You can enter ab test in any path. You can add the bin directory path to the path of the environment variable.

I opened the command line in the bin directory.
Note that you need to add / after the domain name. path

ab -n 100 -c 10 http://www.baidu.com/s

-n represents the number of requests, -c represents the number of concurrency.
s is path, indicating that the test address is specified. If not specified, an "ab: invalid url" error may be reported.
In addition, -t indicates the number of concurrency and requests within s

The tested data is as follows:

D:\apacheab\Apache24\bin>ab -n 100 -c 10 http://www.baidu.com/sThis is ApacheBench, Version 2.3 Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking www.baidu.com (be patient)....done


Server Software: BWS/1.1 ##Server software and version
Server Hostname: www.baidu.com
##Requested address/domain name
Server Port: 80 ##Port

Document Path:        /s  
##Requested path
Document Length:     112435 bytes  
##Page data/returned data amount

Concurrency Level:   10   ##Concurrency Number
Time taken for tests: 4.764 seconds
##How much time was used in total
Complete requests: 100 ##Number of requests
Failed requests: 99 ##Failed requests Why does Baidu fail so many? It should Baidu took precautions
(Connect: 0, Receive: 0, Length: 99, Exceptions: 0)
Total transferred: 11342771 bytes
##The total number of bytes transferred, including http header information, etc.
HTML transferred: 11247622 bytes
##The number of html bytes, the actual number of bytes transferred by the page
Requests per second: 20.99 [#/sec] (mean)
##How many requests per second , this is a very important parameter value, server throughput
Time per request: 476.427 [ms] (mean)
##User average request waiting time
Time per request: 47.643 [ms] (mean) , across all concurrent requests)
##The average processing time of the server, which is the reciprocal of the server throughput
Transfer rate:       2325.00 [Kbytes/sec] received
##The length of data obtained per second

Connection Times (ms)
min mean[/-sd] median max
Connect: 22 41 12.4 39 82##Minimum time, average, median, maximum value of the connection
Processing: 113 386 211.1 330 1246##Processing time
Waiting: 25 80 43.9 73 266##Waiting time
Total: 152 427 210.1 373 1283# #Total time

Percentage of the requests served within a certain time (ms) 50% 373 ## 50% of the requests are returned within 373ms
66% 400 ## 60% of the requests are returned within 400ms
75% 426
80% 465
90 % 761
95% 930
98% 1192
99% 1283
100% 1283 (longest request)

Because the ab tool consumes less , so some people also use it to carry out ddos ​​attacks, and it is considered a ddos ​​attack tool

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