Q01.
Explain what is Jmeter?
Answer:
JMeter
is a Java tool, which is used for performance Load Testing.
Q02.
Explain how JMeter works?
Answer:
JMeter
acts like a group of users sending requests to a target server. It
collects response from the target server and other statistics which
show the performance of the application or server via graphs or
tables.
Q03.
Explain where you can use functions and variables?
Answer:
Variables
and functions can be written into any field of any test component
Q04.
Mention what are regular expressions in Jmeter?
Answer:
Based
on the pattern, a regular expression is used to search and manipulate
text. JMeter is useful in interpreting forms of regular expression or
patterns being used throughout a JMeter test plan.
Q05.
Explain what is Samplers and Thread groups?
Answer:
Thread
group: For any test plan, JMeter is the beginning part of thread
group elements. It is an important element of JMeter, where you can
set a number of users and time to load all the users given in the
thread group
Samplers:
Sampler generates one or more sample results; these sample results
have many attributes like elapsed time, data size, etc. Samplers
allow JMeter to send specific types of requests to the server,
through samplers, thread group decides which type of request it needs
to make. Some of the useful samplers are HTTP request, FTP request,
JDBC request and so on.
Q06.
Whether the test plans built using JMeter are OS dependent?
Answer:
Usually,
Test Plan are saved in their XML format, so there is nothing to do
with any particular OS. It can be run on any OS where JMeter can run.
Q07.
Mention what are the types of a processor in Jmeter?
Answer:
The
types of a processor in JMeter are Pre-processor
Post
processor.
Q08.
Explain what are Pre-processor Elements? List some of the
pre-processor elements?
Answer:
A
pre-processor is something that will happen before the sampler
executes. To configure the sample request prior to its execution or
to update variables that are not extracted from response text
pre-processor elements are used.
Some
of the pre-processor elements are
HTTP
URL re-writing modifier
HTTP
user parameter modifier
HTML
link parser
Bean-Shell
Preprocessor
Q09.
Mention the execution order of Test Elements?
Answer:
The
test plans elements execution order is
Configuration
elements
Pre-processors
Timers
Samplers
Post-processors
Assertions
Listeners
Q10.
What does “contain” and “matches” indicates in the regular
expression?
Answer:
In
the regular expression, contains indicates that the regular
expression matched at least some part of the target. While matches
mean the regular expression matched the whole target. So, ‘alphabet’
is “matched” by ‘al.*t.’
Q11.
Explain what is the configuration elements?
Answer:
A
configuration element works parallel with a Sampler. To set up
defaults and variables for later use by samplers configuration
elements can be used. At the start of the scope, these elements are
processed before any samplers in the same scope.
Q12.
Explain what is a timer in JMeter and what are the types of it?
Answer:
A
JMeter thread by default will send requests continuously without any
pause. To get a pause between the request, Timers are used. Some of
the Timers used are Constant Timer, Gaussian Random Timer,
Synchronizing Timer, Uniform Random Timer and so on.
Q13.
Explain what is Test Fragment?
Answer:
Test
fragment is also a type of element like Thread Group element. The
only difference is test fragment is not implemented unless it is
referenced by either a Module controller or an Include controller.
Q14.
Explain what is Assertion in JMeter? What are the types of
assertion?
Answer:
Assertion
helps to verify that your server under test returns the expected
results
Some
commonly used Assertion in JMeter are
Response
Assertion
Duration
Assertion
Size
Assertion
XML
Assertion
HTML
Assertion
Q15.
Explain how you can reduce the resource requirement in Jmeter?
Answer:
To
reduce the resource requirements in JMeter
Use
non-GUI mode: jmeter –n –t test.jmx –l test.jtl
During
the load, a test doesn’t use “view results tree” or “view
results in table” listeners, use them only during the scripting
phase
Don’t
use functional mode
Instead
of using lots of similar samplers, use the same sampler in a loop and
use the variable to vary the sample
Q16.
Explain how you can perform spike testing in Jmeter?
Answer:
By
synchronizing, timer JMeter spike Testing can be achieved.
Synchronizing timer blocks thread until a specific amount of threads
has been blocked and then release them all together thus creating
large instantaneous load.
Q17.
Explain how you can capture the script of the authentication window
in Jmeter?
Answer:
Normally,
you can capture script by recording.
First,
you have to Thread group in Test plan and then make HTTP Proxy Server
in Workbench
After
that, set port number in the Global Setting box (e.g., 8911) and
modify your connection setting in IE as local host in address 8911 as
in port Then you can start http proxy server in JMeter and run your
application for login
Q18.
List out few JMeter Listeners?
Answer:
Some
of the JMeter Listeners are
Spline
Visualizer
Aggregate
Report
View
Result Tree
View
Result in Table
Monitor
Results
Distribution
Graph
BeanShell
Listener
Summary
Report and so on
Q19.
What is distributed load testing? How can it be achieved?
Answer:
Distributed
load testing is the process through which numerous systems can be
used for simulating a load of a large number of users. By using the
master-slave configuration, JMeter can do distribute load testing.
Q20.
In JMeter is it necessary to call embedded resources explicitly?
Answer:
You
can eliminate all embedded resources from being explicitly called.
Requests have a check-box at the bottom that says “retrieve
embedded resources.” It would grab all CSS, JPG, etc. It is a
brilliant way to find resources and broken link in a web App.
Q21.
Explain what is the role of Timer in Jmeter?
Answer:
With
the help of a timer, JMeter can delay the time between each request,
which a thread makes. It can solve the overload problem of the
server.
Q22.
What Is JMeter? What Are The Other Applications That Can Be Tested
Using Jmeter?
Answer:
Apache
JMeter is an open source software. It is 100% pure Java desktop
application designed to load test functional behavior and measure
performance of the client/server applications.
1.
It was originally designed for testing Web Applications only but has
since then evolved to test other apps.
2.
It’s useful in testing the performance of both static and dynamic
resources like files, Servlets, Perl scripts, Java Objects, Data
Bases, Queries, FTP Servers and more.
3.
JMeter can also perform various other types of testing like
Functional, Regression, and Unit testing.
Q23.
Explain The Basic Work-flow Of Jmeter?
Answer:
JMeter
acts like a group of users sending requests to a target server. It
collects response from target server and other statistics which
depict the performance of the application or server via graphs or
tables.
Q24.
Name The Protocols Supported By Jmeter?
Answer:
Following
are some of the protocols supported by JMeter.
1.
Web Protocol: To test the web applications, it supports both HTTP and
HTTPS protocols.
2.
Web Services: To test web services applications, it supports both
SOAP and REST.
3.
FTP: File Transfer Protocol provides the support for testing the FTP
servers and applications.
4.
Database via JDBC: used for testing the database applications.
5.
LDAP: Lightweight Directory Access Protocol
6.
Message-oriented middle-ware (MOM) via JMS
7.
Mail: used for testing of mail servers such as SMTP(S), POP3(S) and
IMAP(S)
8.
MongoDB (NoSQL): it is recently supported protocol by JMeter.
9.
Native commands or shell scripts
10.
TCP
Q25.
List The Important Features That JMeter Supports?
Answer:
Following
are some of the key features of JMeter.
1.
It’s open-source software and is freely available.
2.
It has a very simple and intuitive GUI.
3.
JMeter can do load and performance test of many different server
types like Web – HTTP, HTTPS, SOAP, Database via JDBC, LDAP, JMS,
Mail via POP3.
4.
It is a platform independent tool. On Linux or Unix, the user can
open the JMeter tool by clicking on the JMeter shell script. However,
on Windows, it can be invoked by starting the jmeter.bat file.
5.
It has full Swing and lightweight component support (precompiled JAR
uses packages java.swing.* ).
6.
JMeter prepares test plans in XML format.
7.
It’s a full multi threading framework allows concurrent sampling by
many threads and simultaneous sampling of different functions by
separate thread groups.
8.
It is highly extensible.
9.
Can also be used to perform automated and functional testing of your
application.
Q26.
What Is A Test Plan In JMeter? List Some Of The Test Plan Elements
Available In Jmeter.
Answer:
A
Test Plan defines and provides a layout of how and what to test.
JMeter can be used to prepare a Test Plan for the web application as
well as the client-server application. It behaves like a container
for running tests.
A
complete Test Plan comprises of one or more of the following
elements.
1.
Thread Group
2.
Controllers
3.
Listeners
4.
Timers
5.
Assertions
6.
Configuration Elements
7.
Pre-Processor Elements
8.
Post-Processor Elements
Q27.
What
Is A Thread Group? List Down Its Main Parts?
Answer:
Thread
group elements are the beginning points of any Test Plan. It is
mandatory to have at least one thread group in the Test Plan.
One
should know the following about the Thread Group.
1.
All controllers and samplers must be under a thread group.
2.
Listeners may be placed directly under the test plan, in which case
they will apply to all the thread groups.
3.
The controls for a thread group allows you to:
i.
set the number of threads.
ii.
Define the ramp-up period.
iii.
Sets the number of times to execute the test.
Following
are the parts of a thread group.
1.
Sampler: It sends various types of requests to the server.
2.
Listeners: It saves the results of the Run. It can be opened for
viewing also.
3.
Timer: It makes the run more realistic by inserting delays between
the requests.
4.
Controller: It is responsible for controlling the flow of the thread
group. An example scenario is where the request definition
includes if-then-else or loop structure.
5.
Config Element: information about the requests to be added to work
with samplers.
6.
Assertion: To check if the response is generated within the given
time and contain the expected data.
Q28.
What Are JMeter Controllers? Explain Their Types?
Answer:
JMeter
provides two types of Controllers.
1.
Samplers Controllers: It enables JMeter to post specific types of
requests to a server. It simulates a user’s request for a page from
the target server.
For
example, you can add an HTTP Request sampler if you need to perform a
POST, GET, or DELETE operation on an HTTP service.
2.
Logical Controllers: It lets you control the order of processing of
Samplers in a Thread. Logic Controllers can change the order of
request coming from any of their child elements.
Q29.
What Is A Configuration Element? List Down Its Elements.
Answer:
Configuration
Element allows you to create defaults and variables to be used by
Samplers. It can be used to add or modify requests made by the
Samplers. It will get executed at the beginning of the scope before
any Samplers present in the same range. Thus, we can say that access
to a configuration element is only allowed from inside the branch
where it is present.
Following
are the key features of Configuration Element.
1.
CSV Data Set Config: It supports reading line by line from a file and
splitting the line into variables.
2.
HTTP Authorization Manager: You can specify one or more user logins
for web pages that are restricted using server authentication.
3.
Java Request Defaults: Using this you can set default values for Java
testing.
4.
HTTP Cookie Manager: The Cookie Manager element has two functions:
i.
It stores and sends cookies just like a web browser.
ii.
Second, you can manually add a cookie to the Cookie Manager. However,
if you do this, the cookie will be shared by all JMeter threads.
5.
HTTP Request Defaults: It lets you set default values to be used by
your HTTP Request controllers.
6.
HTTP Header Manager: It enables you to add or override the HTTP
request headers.
Q30.
Explain What Is Post-Processor?
Answer:
Post-processors
get used for calling an action after a request is made.
For
example, suppose JMeter sends an HTTP request to the web server, and
the user wants JMeter to stop sending the request. If the web server
shows an error, in this case, the user can use post-processor to
perform this action.
Q31.
What
Is The Execution Order Of Test Elements In Test Plan Of Jmeter?
Answer:
Following
is the order of execution of the Test Plan elements.
1.
Configuration elements
2.
Pre-Processors
3.
Timers
4.
Sampler
5.
Post-Processors (unless Sample Result is null)
6.
Assertions (unless Sample Result is null)
7.
Listeners (unless Sample Result is null
Q32.
Is It Required To Prepare Separate Test Plan Using JMeter For The
Testing Of The Same Application On Different Operating System?
Answer:
Following
facts support that a JMeter Test Plan can run on any OS.
1.
JMeter is itself a pure Java-based application which makes it
platform independent.
2.
JMeter uses XML format while saving a Test Plan. Thus, they have
nothing to do with any particular OS. You can run those Test Plans on
any OS where JMeter can run.
Q33.
How Do You Ensure Re-Usability In Your JMeter Scripts?
Answer:
Taking
the following points into consideration we can encourage re-usability
in the test scripts:
1.
Using config elements like “CSV Data Set Config” and “User
Defined Variables” for supporting greater data reuse.
2.
Modularizing the shared tasks and invoking them via a “Module
Controller”.
3.
Creating own Bean Shell functions and reusing them.
Q34.
How Can You Reduce Resource Requirements In Jmeter?
Answer:
Following
are the tricks that help in reducing resource usage.
1.
Use a non-GUI mode.
jmeter
-n -t test.jmx -l test.jtl
2.
It is better to use as few Listeners as possible. Applying the “-l”
flag as shown in above point may delete or disable all the Listeners.
3.
Disable the “View Result Tree” listener as it consumes a lot of
memory and may result in JMeter tool running out of memory. It will
freeze the console too. It is, however, safe to use the “View
Result Tree” listener with only “Errors” kept checked.
4.
Instead of using a similar Sampler a large number of times, use the
same Sampler in a loop and use variables (CSV Data Set) to vary the
sample data. Or perhaps use the Access Log Sampler.
5.
Avoid using functional mode.
6.
Use CSV output rather than XML.
Also,
you may like to read some of the common points.
7.
Try to save the data that you need.
8.
Use as few Assertions as possible.
9.
Disable all JMeter graphs as they consume a lot of memory. All the
real-time graphs can be viewed using the JTL tab in the web
interface.
10.
Do not forget to erase the local path from CSV Data Set Config when
used.
11.
Cleaning of the Files tab before every test run.
Q35.
List The Benefits That JMeter Offers For Performance Testing?
Answer:
JMeter
provides the following advantages for performance testing.
1.
It can be used to test performance for both, static resources as well
as dynamic resources.
2.
It can generate and handle a large number of concurrent users as it
happens on a live website.
3.
It provides a graphical analysis of performance reports.
Q36.
Explain What Is Assertion In JMeter? List Its Types.
Answer:
Assertion
helps to verify that the server under test returns the expected
results.
Some
commonly used Assertion in JMeter are as follows.
1.
Response Assertion: It facilitates the user by comparing the server
response against a string pattern to check that the result is as
expected. For Example, while waiting for a response from the server
the Response Assertion role is to verify that the server response has
probable pattern string, “OK” or not.
2.
Duration Assertion: You may need to test the response from the server
reaches in user-defined time. If it takes longer than the defined
time, server response fails.
3.
Size Assertion: It is to test that each response coming from server
holds the expected number of bytes. It facilitates the user to
specify the size i.e. equal to, greater than, less than or not equal
to a given number of bytes. For example, if the response packet from
a server is less than expected 5000 bytes in size, then a test case
pass, else a test case fails.
4.
XML Assertion: It verifies that the response coming from the server
holds the data in a correct XML format.
5.
HTML Assertion: It is helpful for checking the syntax of the response
data.
Q37. How Do You Ensure Re-ease of use In Your Jmeter Scripts?
Answer:
Utilizing config components
like “CSV Data Set Config”, “Client Defined Variables”, and
so on for more prominent information reuse.
Modularizing shared errands
and conjuring them through a “Module Controller”.
Composing your own Bean-Shell
capacities, and reusing them.
Q38. What is the distinction among gauge and benchmark testing?
Answer:
The contrasts among pattern
and benchmark testing are:
-
Pattern testing is the way toward running a lot of tests to catch execution data. This data can be utilized as a point of reference when in future changes are made to the application while Benchmarking is the way toward looking at your framework execution against an industry standard that is given by some other association.
-
Precedent: We can run benchmark trial of an application, gather and investigate results, and afterward alter a few files on a SQL Server database and run a similar test once more, utilizing the past outcomes to decide if the new outcomes were better, more terrible, or about the equivalent.
Q39. What is a root CA declaration?
Answer:
HTTPS association requires an
endorsement to confirm the associations which get set up when the
program hits the web server. JMeter produces it incidentally to catch
the SSL traffic so as to record the activities. For account
activities by means of versatile, you need this endorsement in your
portable to record the activities.
Q40. Would we be able to utilize Selenium Automated Scripts in JMeter?
Answer:
Indeed, we can run selenium
contents in JMeter to get a few thoughts on their execution. It very
well may be done in 2 different ways.
You can utilize JUnit
libraries to fabricate Selenium contents and spare as Jars and
duplicate the equivalent in JMeter registry. And after that add Junit
sampler to your test plan and import the Jar record.
Something else, Web driver
sampler module can be included the JMeter Ext organizer and after
that restart the JMeter. Compose your selenium code in the Web driver
sampler and afterward execute to see the execution.
Q41. Why does JMeter become a natural choice of the tester when it comes to performance testing?
Answer:
JMeter
tool has benefits like
-
It can be used for testing both static resources like HTML and JavaScript, as well as dynamic resources like Servlets, Ajax, JSP, etc.
-
JMeter has a tendency to determine the maximum number of concurrent users that your website can handle
-
It provides a variety of graphical analyses of performance reports
-
It is free
-
Plug-ins are available to extend the features
Q42.
What
are the different ways of Data Parametrization in JMeter?
Answer:
Data
Parametrization makes the scripts reusable where the values need not
be hard coded for the same request with different parameters. Below
is the data parametrization that is supported in JMeter:
a.CSV
Data Set Config
b.
User Defined Variables
c.
User Parameter
Q43.
How
to reduce the memory requirement for execution using JMeter?
Answer:
To
reduce the memory requirements following steps need to be followed:
a.
Use non-GUI mode for test execution using below command:
jmeter
–n –t test.jmx –l test.jtl
b.
Do not use listeners or disable them before the test started.
c.
Don't use functional mode.
d.
Try to implement scripting logic using available element only
e.
Try to avoid the code (you can use only in that case when the
specific JMeter element is not available)
f.
If you are writing the code logic then use Groovy instead of
BeanShell.
g.
Use CSV output rather than XML.
h.
Save the data which you need.
i.
Use as few Assertions as possible.
Q44.
How to do master-slave configuration in Jmeter?
Answer:
Master-Slave
configuration is a part of Distributed Testing in which more than one
machine is used to perform load testing of the server under test. It
is very important that all machines are on the same network and all
have the same version of JMeter. In distributed testing, one machine
is made as the Master and the others are kept as slaves by doing
below configurations:
a.
On master machine, edit the jmeter.properties file and add the IP
addresses of slave machines against the remote_host field in the
file.
b.
Save the file and open the JMeter again.
c.
Now from the Run menu in JMeter, select Remote Start and choose the
IP of the machine to be invoked.
d.
Choose the Run menu and select Remote Start all to start all the
slave machines for your testing.
Q45.
How sessions and cookies are managed in JMeter?
Answer:
Sessions
and cookies are managed in JMeter by using config elements such as
HTTP Cache Manager which provides an option to save the cookie. There
is also an option to clear the cookies in every iteration and also
allows to add user-defined cookies.
HTTP Cache manager helps to
cache the images and .css file. It can also be cleared after each
iteration as per the requirement in the load tests and also limits
the number of elements which can be stored in the cache.
Q46.
What is Tidy Parsing?
Answer:
Tidy
Parsing is a type of parsing that is used in Xpath extractor. If the
response is in pure XML then tidy parsing is not required whereas, in
case of XHTML, it is mandatory to check the tidy parsing option in
order to fetch the correct results.
Q47.
What
is heap size in jmeter?
Answer:
Jmeter
is work in java, and heap size is related to java. Java heap is the
heap size allocated to JVM applications which takes care of the new
objects being created. If the objects being created exceed the heap
size, it will throw an error of java.lang.out.of.memory.
Java’s
default heap size limit in Jmeter is 256 MB.
Q48. Is it possible that, if we increase the heap size in Jmeter, then application(jmeter) might not work?
Answer:
Yes,
it is possible. Because heap size depends upon the empty space of
your machine in c drive as well as your RAM. If the RAM is 1 Gb and
you increased the heap 2048, it may not work.
Q49. What is Response time in Jmeter report?
Answer:
Response
time in Jmeter report, is the time taken by web server, to answer the
requested query. In simple words, it is the time taken by a web
server to respond the http request.
Q50. How did you go about fixing a performance issue?
Answer:
Set
up JMeter to reproduce the production like scenario to put through
concurrent requests and put the system under heavy load. Used a
profiling tool to monitor CPU times, memory usage, etc.
Q51. Can we perform load testing of database with jmeter?
Answer:
Yes
we can. To see the process follow: Database load testing with jmeter
link. You should be aware of sql queries.
Q52. What is throughput in jmeter listener?
Answer:
Throughput
is relation between time and data. It shows the relation between http
request and unit time. Means how many requests are processed in how
much time.
Throughput = Number of requests / Time(second or
millisecond)
Q53.
How
to exclude timers time (think time or wait time or pause time) from
the transaction response time in JMeter?
Answer:
In
the transaction controller, there is one option "Include
duration of timer and pre-post processors in generated sample".
Un check this option, so that JMeter does not include wait time (or
timer) in the sampler response time. By default, this option is
unchecked.
Q54.
How
to remove (exclude) the response time of a sampler from a transaction
response time in JMeter?
Answer:
There
could be some scenarios where you want to exclude the response time
of a particular sampler from the response time of a transaction
controller. In JMeter, some of the samplers have flow or operational
logic code written in them which should not be included in the
transaction response time. JSR223 and BeanShell Samplers fall in the
same category.
Q55.What
drawbacks do manual load tests have?
Answer:
The
manual load testing drawbacks are:
-
It is very expensive to do Manual Testing, as real users charge by the hour.
-
With manual load testing, load testing for longer durations like for 7 days won’t be possible, as users really work a maximum of eight hours daily.
-
You will not get accuracy for results correlation as there are delays between the actions of users.
-
It is hard to do results collection as the results capture each other.
-
It is hard to do.
Q56.
List
out what are the common performance problem does user face?
Answer:
-
Longer loading time
-
Poor response time
-
Poor Scalability
-
Bottlenecking (coding errors or hardware issues)
Q57.
What
would be your recommendation to improve performance measure?
Answer:
Performance
improvement recommendation always depends on the nature of the
bottleneck. If there is any network related issue then you can
recommend to optimize the latency and bandwidth. At the database
level, verify all indexes and sequences by running profilers. You may
also recommend to optimize the database queries. At the App server
level, run profilers for finding the memory leaks in the application.
At the web server level, you can use monitors and optimize the
throughput and other related metrics of the server.
Q58. What is the difference
between csv data config and login config element ?
Answer:
csv data config
|
login
config element
|
|
It
is used when single user login is required.
Data
has to be entered in Login Config Screen in Jmeter
Only
2 parameters are used in Login config i.e user name and password.
|
Q59. How does HTML Link
Parser work?
Answer:
HTML
Link Parser Pre-Processor extracts all the HTML links from the
response of the previous request and then passes the random link to
the successive request (under which HTML Link Parser is added as a
child element).
Q60.
What
are the attributes of "HTML Link Parser" element?
Answer:
"HTML Link Parser" has following attributes:
Name:To
provide the name of the preprocessor
Comments:To
provide arbitrary comments (if any)
Q61.
How
to add "HTTP Cookie Manager" element?
Answer:
You
can follow the below steps:
1.
Select "Test Plan" node
2.
Right click on "Test Plan" node
3. Mouse hovers
"Add"
4. Mouse hovers "Config Element"
5.
Click "HTTP Cookie Manager"
Q62.
What
are the attributes of "Random Variable" element?
Answer:
"Random
Variable" has attributes:
Name:To
provide element name
Comments:To
provide arbitrary comments (if any)
Variable Name:
The name of the variable to store the generated random value. The
value can be called using the same variable name anywhere in the test
script. Example: ${rand_Customer Id}.
Output Format:You
can specify the format of the string. In the above example; if 12345
value is randomly generated then cust12345 will be the string. If
nothing is specified then randomly generated value will be passed as
it is.
Minimum Value:The
minimum value of random number range.
Maximum Value:The
maximum value of the random number range.
Seed for random
function:The
seed for the random number generator. The default is the current time
in milliseconds. If you use the same seed value with Per Thread set
to 'true', you will get the same value for each Thread.
Per Thread(User):If
it is 'False', then the generated value will be shared between all
threads in the
thread group. If it is 'True', then each thread has its own value.
Q63.
How
to add "Synchronizing Timer" element?
Answer:
You
can follow below steps:
1.
Select "Test Plan" or "Thread Group" or
"Controller" or "Sampler" node where you want to
add the timer
2.
Right-click on the node
3. Mouse hovers "Add"
4.
Mouse hovers "Timers"
5. Click "Synchronizing
Timer"
Q64.
What
are the attributes of "Synchronizing Timer"
element?
Answer:
"Synchronizing
Timer" has following attributes:
Name:
To provide the name
of the timer
Comments:
To provide
arbitrary comments (if any)
Number of Simulated
Users to Group by:
This attribute is
used to define the number of threads to release at a time. If 0 is
given then JMeter will release the same number of users which is
defined in the thread group.
Timeout in milliseconds:
This value
helps to control the timeout of the requests during the test. If 0
(zero) is set then the timer will wait for all the threads to reach
the value which is defined in "Number
of Simultaneous Users to Group".
If superior to 0 (zero), then the timer will wait till the number
given in "Timeout in milliseconds" irrespective of thread
count. If wait time exceeds the given timeout value then the users
are released without meeting "Number
of Simultaneous Users to Group"
criteria. The default value is 0 (zero).
Q65.
What is 90% line in JMeter?
Answer:
•
The aggregate report listener have 90% line as one of the metric. The
Apache JMeter manual describes 90% line as- "90% of the samples
took no more than this time". It is actually the 90 percentile
of the response times of the samples -
• 90 percentile =
(90/100)*N+1/2 where N is the number of samples
• So, if
there are 10 samples then 90%line will be 9.5 or 9. It means the 9th
value in the sorted list of samples (sorted according to ascending
order of their response times) will be the 90%line value.
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