ubuntu中安装apache ab命令并进行压力测试

1.安裝ab命令

sudo apt-get install apache2-utils

2.ab命令参数说明

Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:  

//总的请求数
-n requests Number of requests to perform宅   

//一次同时并发的请求数 总的请求数(n)=次数*一次并发数(c)
-c concurrency Number of multiple requests to make  

-t timelimit Seconds to max. wait for responses
-b windowsize Size of TCP send/receive buffer, in bytes
-p postfile File containing data to POST. Remember also to set -T
-u putfile File containing data to PUT. Remember also to set -T
-T content-type Content-type header for POSTing, eg.
'application/x-www-form-urlencoded'
Default is 'text/plain'
-v verbosity How much troubleshooting info to print
-w Print out results in HTML tables
-i Use HEAD 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)
-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
are a colon separated username and password.
-P attribute Add Basic Proxy Authentication, the attributes
are a colon separated username and password.
-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
-r Don't exit on socket receive errors.
-h Display usage information (this message)
-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
-f protocol Specify SSL/TLS protocol (SSL2, SSL3, TLS1, or ALL)

3.运行 ab -n 100 -c 10 http://www.meetu.hk/ 对 http://www.meetu.hk/ 进行100次请求，10个并发请求压力测试结果。

Server Software: lighttpd/1.4.20
Server Hostname: www.meetu.hk
Server Port: 80  

Document Path: /
Document Length: 2095 bytes  

Concurrency Level: 10  

//整个测试持续的时间
Time taken for tests: 3.303 seconds  

//完成的请求数量
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 235200 bytes
HTML transferred: 209500 bytes  

//平均每秒处理30个请求
Requests per second: 30.27 [#/sec] (mean)  

//平均每个请求处理时间为330毫秒 注:这里将一次10个并发请求看成一个整体
Time per request: 330.335 [ms] (mean)  

//平均每个并发请求处理 时间 为33毫秒
Time per request: 33.034 [ms] (mean, across all concurrent requests)
Transfer rate: 69.53 [Kbytes/sec] received  

Connection Times (ms)
min mean[+/-sd] median max
Connect: 51 170 35.9 178 230
Processing: 60 153 64.5 121 263
Waiting: 55 148 64.4 115 258
Total: 235 322 59.9 299 437  

Percentage of the requests served within a certain time (ms)  

//在这100个请求中有50%在299毫秒内完成
50% 299  

//在这100个请求中有66%在312毫秒内完成
66% 312
75% 383
80% 412
90% 431
95% 432
98% 436
99% 437
100% 437 (longest request)

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