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Saturday, 1 April 2017
How to select last value from correction parameter list?
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LoadRunner Variables
Link: https://www.perfmatrix.com/loadrunner-variables/
Important LoadRunner Functions
Link: https://www.perfmatrix.com/important-loadrunner-utility-functions/
Random Date Generation in LoadRunner
The content has been moved to PerfMatrix Site.
Link: https://www.perfmatrix.com/random-date-generation-in-loadrunner/
Related Topic:
Random Number Generation Methods in LoadRunner
Link: https://www.perfmatrix.com/random-number-generation-in-loadrunner/
Related Topic:
- How to generate a random correlation parameter value?
- How to generate a random date?
- LoadRunner - Parameter Setting
LoadRunner - Which protocol supports "Run Vuser as a process"?
Link: https://www.perfmatrix.com/which-loadrunner-protocol-supports-run-vuser-as-a-process/
Related Topic:
Detailed description - "Run Vuser as a thread" vs "Run Vuser as a process"
LoadRunner - 'Run Vuser as a Process' vs 'Run Vuser as a Thread'
Link: https://www.perfmatrix.com/run-vuser-as-a-process-vs-run-vuser-as-a-thread/
Related Topic:
How to identify which protocol support multithreading (Run Vuser as a thread)?
LoadRunner - Error - "memory violation : Exception ACCESS_VIOLATION received"
Link: https://www.perfmatrix.com/loadrunner-memory-violation-exception-access_violation-received/
LoadRunner - Error - "Server 'server name' has shut down the connection prematurely"
Link: https://www.perfmatrix.com/loadrunner-server-xxx-has-shut-down-the-connection-prematurely/
LoadRunner - Citrix Protocol
protocol.
How does Citrix work?
Citrix works as both thick-client as well as a thin-client application for desktops. It allows users to run applications using the resources of the Citrix server, instead of using the resources of the user’s computer. When a session is connected to a Citrix server from a local machine then the Citrix client creates a bitmap image for the local machine users. The user inputs are sent in the form of x and y coordinate and then the server sends updated bitmap images to the user’s computer.
How does LoadRunner Citrix Protocol work?
Citrix Vuser scripts simulate the Citrix ICA (Independent Computing Architecture) protocol communication between a Citrix client and the server. As mentioned above bitmap images are sent by the Citrix server in the form of a two-dimensional array. This two-dimensional array having pixel information which helps to create an image on the user's system. VuGen uses this pixel information and prepares the hash value using its inbuilt algorithm and generate a script. When VuGen script replay then the validation of bitmap images (in form of hash value) is done. If recorded and replay hash value matches then it is considered that the bitmap images are same and the script is passed. VuGen uses dedicated functions for the user's keyboard and mouse input.
Important points for Citrix Script Recording: You need to keep some important points in your mind while Citrix script recording though VuGen:
a. Save the display setting of the (VuGen) machine where you are recording the script. This display setting will be required at the time of test execution. You need to keep the same display settings on Load Generator while executing the test.
b. Avoid connecting another remote desktop connection at the time of script recording to prevent the changes in the display setting.
c. Use Keyboard input instead of mouse input.
d. Navigate the application using the tab key or shortcut keys.
e. In tree-like structures, while recording, expand each child item to display sub-item in order to emulate the playback effectively.
f. Use ICA file for connection.
g. Record the connection process into the vuser_init section, and the closing process into the vuser_end section.
h. When recording a session, make sure to perform the complete business process, starting with the connection and ending with the cleanup. Do not leave any client or application windows open.
i. Try to avoid resizing the window during recording.
j. Avoid using LoadRunner basic inbuilt function directly.
k. Enable "Generate snapshot on error" under Runtime setting for script debugging purpose.
Runtime setting -> Miscellaneous -> Error Handling -> Generate snapshot on error
l. Use the think time because Citrix transactions, Citrix windows and bitmap functions in LoadRunner take time to stabilize.
m. Do not use "Ignore think time" option while replaying the script.
n. If you find frequent crashes happening and scripts are not getting captured properly then raise a ticket to concerned admin team to restart the application server hosted in the citrix environment.
o. In case of further issue, uninstall/re-install the Citrix receiver and agent in the windows server machine & application server/Citrix server (consider as a last option).Important points for Citrix Script Execution: You need to remember below points while executing the Citrix script though Controller/Performance Center:
a. Set-up the display setting of as same as the VuGen machine. it is because, if the settings are different then sync_on_bitmap functions will fail in the script.
b. Avoid connecting another remote desktop connection from the same controller or load generator machine at the time of script execution.
c. Do not forget to place ICA file on an appropriate path in the controller or load generator.
d. The Citrix VUser’s memory footprint is two to three times a Web VUser’s memory footprint, so use appropriate Load Generator. You can calculate required no. of LG from LG calculator.How to generate ICA file?
Since XenApp 7.x version onward, Citrix does not support to generate ICA file using any third party tool. For this purpose, Citrix has provided "Citrix Quick Launch 4.0" utility. You can download this utility from the given link (version and link may change in future):
https://support.citrix.com/article/CTX219718
Some important Citrix functions: It is recommended to use below given functions for a smooth running of the script:
web_set_sockets_option("IGNORE_PREMATURE_SHUTDOWN", "1");
web_set_sockets_option("SHUTDOWN_MODE","ABRUPT");
web_set_socket_option("CLOSE_KEEPALIVE_CONNECTIONS","TRUE");
web_set_socket_option("MAX_CONNECTIONS_PER_HOST","1");
web_set_sockets_option("SSL_VERSION","TLS");Why keyboard input is preferred than mouse click in Citrix protocol in LoadRunner script?
This makes scripting more reliable along with less scripting and debugging issues. The LR functions recorded with keyboard input and mouse clicks are:
Keyboard Input:
ctrx_key(“RIGHT_ARROW_KEY”, 0);Mouse Click:
ctrx_mouse_click(398, 99, RIGHT_BUTTON, 0, ‘Submit’);Both the functions are used to provide the same input, but when there is a change in display resolution, then mouse click function may fail, because it captures coordinates.
In the same way, while selecting data entry items it is better to use keyboard 'Up' and 'Down' arrow key to select the appropriate data.
Related Topics:
Random value from correlation parameter
PerfMatrix Site Link: https://www.perfmatrix.com/random-value-from-correlation-parameter-in-loadrunner/
"LB=value=\"",
"RB=\"",
"Ord=All",
LAST);
Hope you all are familiar with the most famous correlation function which is written above i.e. "web_reg_save_param". If you are not, read my old posts on correlation. Now, back to the topic, today I will show you how to pick a random value from the list of all captured correlation values through correlation function.
Firstly, you need to give "All" as a value of "Ord" attribute of the correlation function so that all the values; match left and right boundary; can be captured. For your knowledge when you choose "Ord=All" then the correction parameter acts as an array. If you want to choose any specific value then you can append "_<number>" in the correlation parameter and use in the script. For example, if you need to pick 2nd value then the correlation parameter will be "c_correlateParam_2".
To pick the random value you need to use the following statement:
lr_save_string(lr_paramarr_random("c_correlateParam"),"randParam");
where:
lr_paramarr_random: This function returns a random value from the parameter array. The return value will be a 'String'. In the above example, a random value (string) will be picked from "c_correlateParam" array.
lr_save_string: This function is used to save a string into a parameter. In the above example, the random value (string) extracted by lr_paramarr_random will be saved in "randParam".
Now, you can use "randParam" as a parameter in the script which will pass a random value extracted from the list of captured correlation values.
LoadRunner - HTML mode Vs URL mode
Link: https://www.perfmatrix.com/loadrunner-html-mode-vs-url-mode/
File Download Scenario in LoadRunner
Link: https://www.perfmatrix.com/loadrunner-file-download-scenario/
Related Topic:
Active Vuser Count
Link: https://www.perfmatrix.com/loadrunner-active-vuser-count/
Throughput Graph Key Rules
Link: https://www.perfmatrix.com/loadrunner-throughput-graph-key-rules/