Measuring the response bytes using jmeter

If you want/need to measure the response bytes size from the jmeter results and analyze/get the trends. Following will help

Make sure you disable the flag “Keep-alive” in your HTTP request. (Found that enabling this can skew the payload size that jmeter reports. In a thread, if the request is made multiple times jmeter tool provides the cumulative payload size instead of the individual request response bytes. )

If you create CDF for this bytes data, the graph is a straight line with very high payload data which is ever increasing. Unless you need the keep-alive for your request, disable it in your http request.

How to Assert on HTTP Response Code in Jmeter

While testing performance of web applications we would want to verify the pages are functioning as expected. But sometimes the page is too huge for the jmeter test client to download, or some times you are not concerned about the contents of the response page, rather you just want to make sure the page is delivered, i.e. there are no 404 or 500’s , but the response code is 200 OK, or redirect 302 , which ever is expected in your test scenario.

solution :

In the Response Assertion you should select “Response Code” rather than the default response, and add 200|302 if you are expecting redirect or 200 if you want to test if the page is being delivered without at issues.

Functions in Jmeter Bean Shell

Type of function	Name	Comment
Information	threadNum	get thread number
Information	machineName	get the local machine name
Information	time	return current time in various formats
Information	log	log (or display) a message (and return the value)
Information	logn	log (or display) a message (empty return value)
Input	StringFromFile	read a line from a file
Input	CSVRead	read from CSV delimited file
Input	XPath	Use an XPath expression to read from a file
Calculation	counter	generate an incrementing number
Calculation	intSum	add int numbers
Calculation	longSum	add long numbers
Calculation	Random	generate a random number
Scripting	BeanShell	run a BeanShell script
Scripting	javaScript	process JavaScript (Mozilla Rhino)
Scripting	jexl	evaluate a Commons Jexl expression
Properties	property	read a property
Properties	P	read a property (shorthand method)
Properties	setProperty	set a JMeter property
Variables	split	Split a string into variables
Variables	V	evaluate a variable name
Variables	eval	evaluate a variable expression
Variables	evalVar	evaluate an expression stored in a variable
String	regexFunction	parse previous response using a regular expression
String	char	generate Unicode char values from a list of numbers
String	unescape	Process strings containing Java escapes (e.g. \n & \t)
String	unescapeHtml	Decode HTML-encoded strings
String	escapeHtml	Encode strings using HTML encoding

Reference / details – http://jakarta.apache.org/jmeter/usermanual/functions.html

JavaRequest in JMeter

click here for a cool tutorial on building JavaRequest component in Jmeter –