Introduction

Sometimes you need to check how performant your webserver is when it comes to concurrent connections or high traffic. This script will benchmark one or many webservers and plot the results into an image.

Usage

Just save the script as benchmark.sh and run it. The script will ask you for one or more webservers to specify separated by comma.

Change tho total (how many connects to server) and concurrent (how many connects in parallel) variables if you need to.

The script

#!/bin/bash
# This script will benchmark one or many webservers and plot the results into an image.

total=1000
concurrent=10

#################################################################################

echo "Type the adresses of the webserver separated by comma followed by [ENTER]:"

while read webservers
do
  what="$webservers"

  if [ -z "${what}" ];
  then
    echo "You did not specify a webserver to benchmark!"
  else
    OIFS=$IFS
    IFS=','
    arr=$what
    counter=0
    echo "set terminal png" >> _temp.txt
    echo "set output 'out.png'" >> _temp.txt
    echo "set title 'Webserver Benchmark'" >> _temp.txt
    echo "set size 1,1" >> _temp.txt
    echo "set key left top" >> _temp.txt
    echo "set grid y" >> _temp.txt
    echo "set xlabel 'request'" >> _temp.txt
    echo "set ylabel 'response time (ms)'" >> _temp.txt
    plot="plot"
    for x in $arr
    do
      echo "> Running benchmark for $x"
      if [ "$counter" -gt 0 ];
      then
        plot=$plot","
      fi
      plot=$plot" 'benchmark_server_data_$counter.txt' using 10 smooth sbezier with lines title '$x'"  
      ab -n $total -c $concurrent -k -g benchmark_server_data_$counter.txt -H 'Accept-Encoding:gzip,deflate' $x
      counter=$(( counter + 1 ))
    done
    IFS=$OIFS
    echo $plot >> _temp.txt
    gnuplot _temp.txt
    rm _temp.txt
    rm benchmark_server_data_*
    exit
  fi
done