From 5dff2d61cc1c27747ee398e04d8e02843aabb1f8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 7 May 2024 04:04:06 +0200 Subject: Adding upstream version 2.4.38. Signed-off-by: Daniel Baumann --- docs/manual/programs/ab.html.en | 360 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 360 insertions(+) create mode 100644 docs/manual/programs/ab.html.en (limited to 'docs/manual/programs/ab.html.en') diff --git a/docs/manual/programs/ab.html.en b/docs/manual/programs/ab.html.en new file mode 100644 index 0000000..84ea0ed --- /dev/null +++ b/docs/manual/programs/ab.html.en @@ -0,0 +1,360 @@ + + + + + +ab - Apache HTTP server benchmarking tool - Apache HTTP Server Version 2.4 + + + + + + +
+

Modules | Directives | FAQ | Glossary | Sitemap

+

Apache HTTP Server Version 2.4

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+

ab - Apache HTTP server benchmarking tool

+
+

Available Languages:  en  | + fr  | + ko  | + tr 

+
+ +

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.

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+

Synopsis

+

ab + [ -A auth-username:password ] + [ -b windowsize ] + [ -B local-address ] + [ -c concurrency ] + [ -C cookie-name=value ] + [ -d ] + [ -e csv-file ] + [ -E client-certificate file ] + [ -f protocol ] + [ -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

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+

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).
+ +
-b windowsize
+
Size of TCP send/receive buffer, in bytes.
+ +
-B local-address
+
Address to bind to when making outgoing connections.
+ +
-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'.
+ +
-E client-certificate-file
+
When connecting to an SSL website, use the provided client certificate + in PEM format to authenticate with the server. The file is expected to + contain the client certificate, followed by intermediate certificates, + followed by the private key. Available in 2.4.36 and later.
+ +
-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
+
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. 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)
+
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+

Output

+

The following list describes the values returned by ab: +

+ +
+
Server Software
+
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
+
The DNS or IP address given on the command line
+ +
Server Port
+
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
+
The request URI parsed from the command line string.
+ +
Document Length
+
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
+
The number of concurrent clients used during the test
+ +
Time taken for tests
+
This is the time taken from the moment the first socket connection + is created to the moment the last response is received
+ +
Complete requests
+
The number of successful responses received
+ +
Failed requests
+
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
+
The number of errors that failed during write (broken pipe).
+ +
Non-2xx responses
+
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
+
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
+
The total number of bytes received from the server. This number + is essentially the number of bytes sent over the wire.
+ +
HTML transferred
+
The total number of document bytes received from the server. This + number excludes bytes received in HTTP headers
+ +
Requests per second
+
This is the number of requests per second. This value is the result + of dividing the number of requests by the total time taken
+ +
Time per request
+
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
+ +
Transfer rate
+
The rate of transfer as calculated by the formula + totalread / 1024 / timetaken
+
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+

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.

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Available Languages:  en  | + fr  | + ko  | + tr 

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Comments

Notice:
This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our mailing lists.
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