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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