ubuntu中安装apache ab命令进行简单压力测试
    1.安装ab命令
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apt-get install apache2-utils
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2.ab命令参数说明.
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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)
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3.运行 ab -n 100 -c 10 http://hikin.iteye.com/
?下面是对http://hikin.iteye.com/?? 进行着100次请求,10个请求同时并发 压力测试结果
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Server Software:        lighttpd/1.4.20
Server Hostname:        hikin.iteye.com
Server Port:            80
Document Path:          /
Document Length:        2095 bytes
Concurrency Level:      10
//整个测试持续的时间
Time take