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apache:benchmarks_with_ab

ab - Apache HTTP server benchmarking tool

ab is a tool for benchmarking your Apache Hypertext Transfer Protocol (HTTP) server. It is designed to give you an impression of how your current Apache installation performs. This especially shows you how many requests per second your Apache installation is capable of serving.

Options

-A auth-username:password Supply BASIC Authentication credentials to the server. The username and password are separated by a single : and sent on the wire base64 encoded. The string is sent regardless of whether the server needs it (i.e., has sent an 401 authentication needed).

-c concurrency Number of multiple requests to perform at a time. Default is one request at a time.

-C cookie-name=value Add a Cookie: line to the request. The argument is typically in the form of a name=value pair. This field is repeatable.

-d Do not display the “percentage served within XX [ms] table”. (legacy support).

-e csv-file Write a Comma separated value (CSV) file which contains for each percentage (from 1% to 100%) the time (in milliseconds) it took to serve that percentage of the requests. This is usually more useful than the 'gnuplot' file; as the results are already 'binned'.

-g gnuplot-file Write all measured values out as a 'gnuplot' or TSV (Tab separate values) file (same for Excel). This file can easily be imported into packages like Gnuplot, IDL, Mathematica, Igor or even Excel. The labels are on the first line of the file.

-h Display usage information.

-H custom-header Append extra headers to the request. The argument is typically in the form of a valid header line, containing a colon-separated field-value pair (i.e., “Accept-Encoding: zip/zop;8bit”).

-i Do HEAD requests instead of GET.

-k Enable the HTTP KeepAlive feature, i.e., perform multiple requests within one HTTP session. Default is no KeepAlive.

-n requests Number of requests to perform for the benchmarking session. The default is to just perform a single request which usually leads to non-representative benchmarking results.

-p POST-file File containing data to POST.

-P proxy-auth-username:password Supply BASIC Authentication credentials to a proxy en-route. The username and password are separated by a single : and sent on the wire base64 encoded. The string is sent regardless of whether the proxy needs it (i.e., has sent an 407 proxy authentication needed).

-q When processing more than 150 requests, ab outputs a progress count on stderr every 10% or 100 requests or so. The -q flag will suppress these messages.

-s When compiled in (ab -h will show you) use the SSL protected https rather than the http protocol. This feature is experimental and very rudimentary. You probably do not want to use it.

-S Do not display the median and standard deviation values, nor display the warning/error messages when the average and median are more than one or two times the standard deviation apart. And default to the min/avg/max values. (legacy support).

-t timelimit Maximum number of seconds to spend for benchmarking. This implies a -n 50000 internally. Use this to benchmark the server within a fixed total amount of time. Per default there is no timelimit.

-T content-type Content-type header to use for POST data.

-v verbosity Set verbosity level - 4 and above prints information on headers, 3 and above prints response codes (404, 200, etc.), 2 and above prints warnings and info.

-V Display version number and exit.

-w Print out results in HTML tables. Default table is two columns wide, with a white background.

-x <table>-attributes String to use as attributes for <table>. Attributes are inserted <table here >.

-X proxy[:port] Use a proxy server for the requests.

-y <tr>-attributes String to use as attributes for <tr>.

-z <td>-attributes String to use as attributes for <td>.

Examples

ab benchmark example with multiple options

ab -v 100 -C "flashsupport=enabled; javascriptsupport=enabled;" -H "AcceptEncoding:application/x-shockwave-flash" -n 100 -c 5 http://example.com/index.php

The command is executed with the following options:=

  • -v 100 : verbose output (show as much information as possible)
  • -C “…” : sending the http request with two cookies
  • -H “…” : sending a http header value
  • -n 100 : sending 100 requests
  • -c 5 : concurrency 5 means 5 requests at the same time

Benchmark www.google.ch with 200 requests

# ab -n 200 http://google.ch/
 
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.121.2.1 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/
 
Benchmarking google.ch (be patient)
Completed 100 requests
Finished 200 requests
 
 
Server Software:        GWS/2.1
Server Hostname:        google.ch
Server Port:            80
 
Document Path:          /
Document Length:        218 bytes
 
Concurrency Level:      1
Time taken for tests:   6.703931 seconds
Complete requests:      200
Failed requests:        0
Write errors:           0
Non-2xx responses:      200
Total transferred:      112200 bytes
HTML transferred:       43600 bytes
Requests per second:    29.83 [#/sec] (mean)
Time per request:       33.520 [ms] (mean)
Time per request:       33.520 [ms] (mean, across all concurrent requests)
Transfer rate:          16.26 [Kbytes/sec] received
 
Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       13   13   0.1     13      14
Processing:    15   20  16.1     16     120
Waiting:       15   19  16.0     16     119
Total:         28   33  16.1     29     133
 
Percentage of the requests served within a certain time (ms)
  50%     29
  66%     30
  75%     31
  80%     31
  90%     33
  95%     53
  98%    117
  99%    124
 100%    133 (longest request)

ab with htaccess authentication

# ab -n 200 -A username:top_secret  http://www.example.com/
 
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.121.2.1 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/
 
Benchmarking ez.example.com (be patient)
[root@eul0000907 root2]# ab -n 200 http://google.ch/
This is ApacheBench, Version 2.0.40-dev <$Revision: 1.121.2.1 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/
 
Server Software:        Apache
Server Hostname:        ez.example.com
Server Port:            80
 
Document Path:          /
Document Length:        33963 bytes
 
Concurrency Level:      1
Time taken for tests:   395.631556 seconds
Complete requests:      200
Failed requests:        0
Write errors:           0
Total transferred:      6871200 bytes
HTML transferred:       6792600 bytes
Requests per second:    0.51 [#/sec] (mean)
Time per request:       1978.158 [ms] (mean)
Time per request:       1978.158 [ms] (mean, across all concurrent requests)
Transfer rate:          16.96 [Kbytes/sec] received
 
Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.0      0       0
Processing:  1942 1977  27.3   1964    2056
Waiting:     1877 1911  26.4   1899    1986
Total:       1942 1977  27.3   1964    2056
 
Percentage of the requests served within a certain time (ms)
  50%   1964
  66%   1986
  75%   2002
  80%   2011
  90%   2022
  95%   2025
  98%   2033
  99%   2044
 100%   2056 (longest request)
/srv/wiki.niwos.com/data/pages/apache/benchmarks_with_ab.txt · Last modified: 2009/08/15 19:30 (external edit)