关于apache的ab工具测试请求数及并发数

最近在测试自己代码性能几服务端配置的时候遇到了测试问题 后来发现apache的一个ab测试工具非常的简单实用 满足作为程序员的需求

ab的全称是ApacheBench，是 Apache 附带的一个小工具，专门用于 HTTP Server 的benchmark testing，可以同时模拟多个并发请求。

例子：windows下cmd C:\Program Files\Apache Software Foundation\Apache2.2\bin<ab -k -n 10 -c 10 http://www.google.com/

-n位请求数 -c为并发数 -k为保持连接

一般情况下这样就够用了

详细注释：

ab [ -Aauth-username:password ] [ -cconcurrency ] [ -Ccookie-name=value ] [ -d ] [ -ecsv-file ] [ -ggnuplot-file ] [ -h ] [ -Hcustom-header ] [ -i ] [ -k ] [ -nrequests ] [ -pPOST-file ] [ -Pproxy-auth-username:password ] [ -q ] [ -s ] [ -S ] [ -ttimelimit ] [ -Tcontent-type ] [ -vverbosity] [ -V ] [ -w ] [ -x-attributes] [ -Xproxy[:port] ] [ -y-attributes ] [ -z-attributes ] [http://]hostname[:port]/path

-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 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 -attributes

String to use as attributes for. Attributes are insertedhere <.

-X proxy[:port]

Use a proxy server for the requests.

-y -attributes

String to use as attributes for .

-z -attributes

String to use as attributes for .

官方ab：http://httpd.apache.org/docs/2.0/programs/ab.html