ab [ –A auth-username:password ] [ –b windowsize ] [ –B local-address ] [ –c concurrency ] [ –C cookie-name=value ] [ –d ] [ –e csv-file ] [ –fprotocol ] [ –g gnuplot-file ] [ –h ] [ –H custom-header ] [ –i ] [ –k ] [ –l ] [ –m HTTP-method ] [ –n requests ] [ –p POST-file ] [ –P proxy-auth-username:password ] [ –q ] [ –r ] [ –s timeout ] [ –S ] [ –t timelimit ] [ –T content-type ] [ –u PUT-file ] [ –v verbosity] [ –V ] [ –w ] [ –x <table>-attributes ] [ –X proxy[:port] ] [ –y <tr>-attributes ] [ –z <td>-attributes ] [ –Z ciphersuite ] [http[s]://]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).

-b windowsize

Size of TCP send/receive buffer, in bytes.

-B local-address

Address to bind to when making outgoing connections.

-c concurrency 并发数

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

一次执行多个请求的数量。默认值一次一个。

-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\’.

-f protocol

Specify SSL/TLS protocol (SSL2, SSL3, TLS1, TLS1.1, TLS1.2, or ALL). TLS1.1 and TLS1.2 support available in 2.4.4 and later.

-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.

-l

Do not report errors if the length of the responses is not constant. This can be useful for dynamic pages. Available in 2.4.7 and later.

-m HTTP-method

Custom HTTP method for the requests. Available in 2.4.10 and later.

-n requests 请求数

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.

基准测试会话的请求数

-p POST-file

File containing data to POST. Remember to also set -T.

-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.

-r

Don\’t exit on socket receive errors.

-s timeout

Maximum number of seconds to wait before the socket times out. Default is 30 seconds. Available in 2.4.4 and later.

-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/PUT data, eg. application/x-www-form-urlencoded. Default is text/plain.

-u PUT-file

File containing data to PUT. Remember to also set -T.

-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>.

-Z ciphersuite

Specify SSL/TLS cipher suite (See openssl ciphers)

测试结果：

 The following list describes the values returned by ab:

Server Software 服务器软件

The value, if any, returned in the server HTTP header of the first successful response. This includes all characters in the header from beginning to the point a character with decimal value of 32 (most notably: a space or CR/LF) is detected.

Server Hostname 服务器主机名

The DNS or IP address given on the command line

Server Port 服务器端口

The port to which ab is connecting. If no port is given on the command line, this will default to 80 for http and 443 for https.

SSL/TLS Protocol

The protocol parameters negotiated between the client and server. This will only be printed if SSL is used.

Document Path 文件路径

The request URI parsed from the command line string.

Document Length 文件长度

This is the size in bytes of the first successfully returned document. If the document length changes during testing, the response is considered an error.

Concurrency Level 并发级别

The number of concurrent clients used during the test

Time taken for tests 测试时间

This is the time taken from the moment the first socket connection is created to the moment the last response is received

Complete requests 完整请求

The number of successful responses received

Failed requests 请求失败

The number of requests that were considered a failure. If the number is greater than zero, another line will be printed showing the number of requests that failed due to connecting, reading, incorrect content length, or exceptions.

Write errors 写错误

The number of errors that failed during write (broken pipe).

Non-2xx responses 非200响应

The number of responses that were not in the 200 series of response codes. If all responses were 200, this field is not printed.

Keep-Alive requests Keep-Alive请求数

The number of connections that resulted in Keep-Alive requests

Total body sent

If configured to send data as part of the test, this is the total number of bytes sent during the tests. This field is omitted if the test did not include a body to send.

Total transferred 从服务器接收的总字节数

The total number of bytes received from the server. This number is essentially the number of bytes sent over the wire.

HTML transferred 从服务器接收HTML字节数

The total number of document bytes received from the server. This number excludes bytes received in HTTP headers

Requests per second 每秒请求数

This is the number of requests per second. This value is the result of dividing the number of requests by the total time taken 该值总请求数除以总时间

Time per request 每个请求花费的平均时间

The average time spent per request. The first value is calculated with the formula concurrency * timetaken * 1000 / done while the second value is calculated with the formula timetaken * 1000 / done

第一个Time per request：concurrency（并发数） * timetaken（耗时） * 1000 / done（请求数）

第一个Time timetaken：（耗时） * 1000 / done（请求数）

Transfer rate 传输效率

The rate of transfer as calculated by the formula totalread / 1024 / timetaken

计算公式：Total transferred/1024/Time taken