ab benchmark and chart

apache benchmart又稱ab benchmark

是一套簡單好用的壓測工具

測試的參數網路上眾多說明

或直接執行"ab"指令，也可以看到說明

# ab
ab: wrong number of arguments
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
    -n requests     Number of requests to perform
    -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)

這邊介紹將ab的結果製圖的工具gnuplot

透過執行gnuplot指令，可以進入互動模式

# gnuplot 
        G N U P L O T
        Version 4.4 patchlevel 3
        last modified March 2011
        System: SunOS 5.11
        Copyright (C) 1986-1993, 1998, 2004, 2007-2010
        Thomas Williams, Colin Kelley and many others
        gnuplot home:     http://www.gnuplot.info
        faq, bugs, etc:   type "help seeking-assistance"
        immediate help:   type "help"
        plot window:      hit 'h'
Terminal type set to 'unknown'
gnuplot>

互動模式下可以輸入製圖的參數：

gnuplot> set terminal png
Terminal type set to 'png'
Could not find/open font when opening font "arial", using internal non-scalable font
Options are 'nocrop medium size 640,480 '
gnuplot> set output "ApacheBenchmarkResults.png" （設定圖片名稱）
gnuplot> set title "Benchmark from Server X"
gnuplot> set size 1,0.5
gnuplot> set key left top
gnuplot> set xlabel 'request'
gnuplot> set ylabel 'ms'
gnuplot> plot "out.dat"  using 10 with lines title 'Benchmark from Server X'  （這句是真正產圖的重點）
gnuplot> exit （離開）

圖形產出如下：

另外修改參數，讓圖形平滑化：

set terminal png
set output "ApacheBenchmarkResults.png"
set title "Benchmark from Server X"
set size 1,0.5
set key left top
set xlabel 'request'
set ylabel 'ms'
plot "out.dat"  using 9 smooth sbezier with lines title "nodejs"
exit

產出圖形如下：

給有需要的人參考...