Graphing of gnuplot data from Apache Benchmark. This plot show the % of requests completed (y-axis) before a given time (x-axis).

plot.gp

# Tell gnuplot to use tabs as the delimiter instead of spaces (default)
set datafile separator '\t'

# output as png image
set terminal png

# save file to "benchmark.png"
set output "benchmark.png"

# The graph title
set title "HTTP Benchmark"

# Where to place the legend/key
set key right bottom

# x-axis label
set xlabel "seconds"
set grid x
set logscale x

# y-axis label
set ylabel "% of completed requests"
set grid y
set format y '%2.0f%%'

stats "out.dat" every ::2 using 5 prefix "A"
# data must be sort according to their value (default order has a bias due to late request are obviously long)
# column 9 in sort is equivalent to 5 with a tabulated separated data
plot '<(tail -n +2 out.dat | sort -n -k 9)' every ::2 using 5:(100*$0/A_records) smooth sbezier with lines t '% of request done before time'

test.s

$ ab -n 1000 -c 10 -g out.dat http://example.com/