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