Apache Benchmark draw graph using gnuplot

http://www.bradlanders.com/2013/04/15/apache-bench-and-gnuplot-youre-probably-doing-it-wrong/

In gnuplot command line 

# Let's output to a jpeg file
set terminal jpeg size 500,500
# This sets the aspect ratio of the graph
set size 1, 1
# The file we'll write to
set output "graphs/timeseries.jpg"
# The graph title
set title "Benchmark testing"
# Where to place the legend/key
set key left top
# Draw gridlines oriented on the y axis
set grid y
# Specify that the x-series data is time data
set xdata time
# Specify the *input* format of the time data
set timefmt "%s"
# Specify the *output* format for the x-axis tick labels
set format x "%S"
# Label the x-axis
set xlabel 'seconds'
# Label the y-axis
set ylabel "response time (ms)"
# Tell gnuplot to use tabs as the delimiter instead of spaces (default)
set datafile separator '\t'
# Plot the data
plot "data/testing.tsv" every ::2 using 2:5 title 'response time' with points



Result graph

This graph based on this data

This is ApacheBench, Version 2.3 <$Revision: 1663405 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)

Server Software:      
Server Hostname:        127.0.0.1
Server Port:            3000

Document Path:          /data/file.zip
Document Length:        11580702 bytes

Concurrency Level:      10
Time taken for tests:   25.046 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      11580989000 bytes
HTML transferred:       11580702000 bytes
Requests per second:    39.93 [#/sec] (mean)
Time per request:       250.458 [ms] (mean)
Time per request:       25.046 [ms] (mean, across all concurrent requests)
Transfer rate:          451555.03 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.3      0       3
Processing:   158  250  30.2    244     335
Waiting:        6   12   3.8     11      41
Total:        158  250  30.2    245     335

Percentage of the requests served within a certain time (ms)
  50%    245
  66%    252
  75%    262
  80%    279
  90%    295
  95%    305
  98%    312
  99%    328
 100%    335 (longest request)

nginx ab(Apache Benchmark) test apr_socket_recv: Connection refused

$ab -n 100 -c http://localhost:3000/test

-> this command will error
"apr_socket_recv: Connection refused"

this error is caused by "http://localhost"
change url to 127.0.0.1

it will okay

node.js server cluster test

Node.js Server Cluster test Benchmark using AB(Apache Banchmark)

server code(no cluster)

var http = require("http");

http.createServer(function(request, response) {
    var s = 64*1024;
  var buf = new Buffer(s);
  for(var i=0;i<buf.length;i++){
    buf[i]=100;
  }
    //console.log("Request for:  " + request.url);
    response.writeHead(200);
    response.end(buf);
  }).listen(3000);

output
==========================================

==========================================

ab result

Server Software:
Server Hostname:		localhost
Server Port:		3000
Document Path:		/
Document Length:		65536 bytes
Concurrency Level:		200
Time taken for tests:		17.481 seconds
Complete requests:		10000
Failed requests:		0
Total transferred:		656110000 bytes
HTML transferred:		655360000 bytes
Requests per second:		572058.72
Transfer rate:		37533344.59 kb/s received
Connnection Times (ms)
	min	avg	max
Connect:	0	0	15
Processing:	40	346	826
Total:	40	346	841

server code(cluster)

var cluster = require("cluster");
var http = require("http");
var numCPUs = require("os").cpus().length;

if (cluster.isMaster) {
  for (var i = 0; i < numCPUs; i++) {
    cluster.fork();
  }
} else {
  var s = 64*1024;
  var buf = new Buffer(s);
  for(var i=0;i<buf.length;i++){
    buf[i]=100;
  }
  http.createServer(function(request, response) {
    //console.log("Request for:  " + request.url);
    response.writeHead(200);
    response.end(buf);
  }).listen(3000);
}

output
======================================

======================================

ab result

Server Software:
Server Hostname:		localhost
Server Port:		3000
Document Path:		/
Document Length:		65536 bytes
Concurrency Level:		200
Time taken for tests:		19.403 seconds
Complete requests:		10000
Failed requests:		0
Total transferred:		656110000 bytes
HTML transferred:		655360000 bytes
Requests per second:		515385.73
Transfer rate:		33814973.33 kb/s received
Connnection Times (ms)
	min	avg	max
Connect:	0	0	13
Processing:	70	385	809
Total:	70	385	822