Comments on: What is correlation?

By: Archana

Archana — Wed, 18 Jan 2012 05:21:31 +0000

Correlation = The process of enhancing a VuGen script to process dynamic data passed between client and server.

** Dynamic value are hardcorded in the generated script.**

Step 1 (in Vugen script) Login
Client login with username/pwd TO SERVER

Server= Authenticate, provide sessionid@234567

Step 2 (in Vugen Script) Client request info @234567
SERVER= Provide info with correct sessionid .
( this is while recording a vugen script)
———————————————————–
Replay fails due to hardcoded value ………
Step 1 (in Vugen script) Login
Client login with username/pwd TO SERVER

Server= Authenticate, provide sessionid@678230(this is a new sessionid )

Step 2 (in Vugen Script) Client request info @234567
Client request info sessionid @234567

SERVER = failing request due to sessionid mismatch….
Vugen script replay fails.
——————————————————–
Dynamic Value Correlation= Capture and reuse new dynamic value during script replay.
example=== Capture the value @234567 and save to placeholder {abc}.
Replace hardcoded value @234567 with placeholder{abc}
———————————————————
Web_reg_save_param_ex ()(“Session_ID” ,”LB=Sessionid=” ,”RB=\”",”Ord=1″,Last);
——————————————————–

By: gowthami

gowthami — Wed, 07 Dec 2011 11:06:47 +0000

can u tell me why dynamic value generated while scripting

By: Naveen

Naveen — Tue, 05 Jul 2011 05:40:14 +0000

My question is , if not find the seesion ID in tree tab, then hw we can do the correlation please give me the answer ………

By: Ankit

Ankit — Mon, 30 May 2011 13:02:11 +0000

Hi All,

Need your inputs on below issue:

User interface: BOXI 3.1 Infoview opendoc.

Phase: Performance testing
Tool: HP Load Runner 9.1. (LR)
Issue in parameter: Correlation

We need to perform PT for 120 users as part of project requirement. As there are many web links that are traversed while browsing report in Infoview (login, prompt, default view, drill etc) we have used automated correlation so LR can keep track of changing session ID.

LR script is working fine with 25-35 users and beyond that it starts throwing an error “Error -26377: No match found for the requested parameter “WCS_param6″. Check whether the requested boundaries exist in the response data. Also, if the data you want to save exceeds 1024 bytes, use web_set_max_html_param_len to increase the parameter size”

Additional inputs may be helpful to analyze

1. Without use of correlation the response time of transactions is too very low (.001sec) and is not realistic.
2. web_set_max_html_param_len is already increased to 262144 bytes. (gives same error again on increasing the number of users).
3. Due to many traversal of links (in between there are many blank pages) we are unable to view the report execution in Run Time Viewer of Load Runner.

Please share inputs from your experience of load runner with BO Infoview reports. Also if you have any reference to MANUAL CORRELATION please let us know.

Any pointers for resolving the issue will be highly appreciated.

Thanks,
Ankit

By: Rakesh Ranjan Kumar

Rakesh Ranjan Kumar — Tue, 22 Feb 2011 09:14:19 +0000

i am doing correlation manually during run left boundary value also changing some time how i handle this things

Please revert ASAP

By: Rakesh Ranjan Kumar

Rakesh Ranjan Kumar — Tue, 22 Feb 2011 09:10:30 +0000

i have to test 3 scenario through 1 script for example:- through my application you can book air ticket,Train ticket and bus ticket.can i give 30% uaers load on air ticket ,30% uaers load on train ticket and 40% uaers load on bus ticket through 1 loadrunner script.

By: srinivas

srinivas — Mon, 23 Aug 2010 09:16:11 +0000

Hi ,
This is srinivas working as amanual tester .now i want to learn loadrunner………pls guide me how to learn loadrunner

By: Doug

Doug — Fri, 14 May 2010 14:29:53 +0000

I am also new to this blog, as well as to LoadRunner. We have a big project coming up and I want to see if manual correlation is something that will help us. Could someone please explain how it works and provide screenshots if possible? Thanks very much.

By: Parveen Shaik

Parveen Shaik — Wed, 12 May 2010 04:41:58 +0000

Hi,
In my current propject i am facing am issue,There is a scenario that where i need to create a helpdesk ticket ,at run time it generates some unquie values,which at run time throwing error saying validating unquie index defined on the form,but there are no whihc unquie values defined actually,is it a correlation issue ,i have tried to record two scripts and compared them there many values generated and they are different for each recording, I have tried correlating helpdesk number still i am getting issue,should i have to correlate all the values which are different for each recording ? Please let me know ASAP,Waiting for reply,

Thanks,
Parveen

By: subashini

subashini — Thu, 22 Apr 2010 17:49:19 +0000

Hi,

I m new to this blog.Cud u plz explain me to manually correlate the date in Loadrunner scripts.I m undergoing training in Loadrunner