On Apache
Under GNU General Public License
2012-05-25 17:05 @38.107.179.238 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
AB(8) ab AB(8)
NAME
ab - Apache HTTP server benchmarking tool
SYNOPSIS
ab [ -A auth-username:password ] [ -c concurrency ] [ -C cookie-name=value ] [ -d ] [ -e
csv-file ] [ -g gnuplot-file ] [ -h ] [ -H custom-header ] [ -i ] [ -k ] [ -n requests ] [
-p POST-file ] [ -P proxy-auth-username:password ] [ -q ] [ -s ] [ -S ] [ -t timelimit ] [
-T content-type ] [ -v verbosity] [ -V ] [ -w ] [ -x <table>-attributes ] [ -X
proxy[:port] ] [ -y <tr>-attributes ] [ -z <td>-attributes ] [http://]hostname[:port]/path
SUMMARY
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.
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 pass-
word 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 authen-
tication 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 warn-
ing/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 inter-
nally. 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>.
BUGS
There are various statically declared buffers of fixed length. Combined with the lazy
parsing of the command line arguments, the response headers from the server and other
external inputs, this might bite you.
It does not implement HTTP/1.x fully; only accepts some 'expected' forms of responses. The
rather heavy use of strstr(3) shows up top in profile, which might indicate a performance
problem; i.e., you would measure the ab performance rather than the server's.
Apache HTTP Server 2004-11-14 AB(8)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-25 17:05 @38.107.179.238 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)