opensta-users

[OpenSTA-users] Because of High CPU usage users failed

[parag j. <par...@gm...>]

Hi,

I am using a server having following specifications:

Processor: Intel Pentium 4, 3 GHz
RAM : 1GB

I have analyzed performance of a Server using Perfmon while executing
a script for multiple users (say 10, 50 users)
and I found that  % Processor Time is above 90 %.
And I get following errors:

E* HTTPRESPONSE (HTML parser): unresolved variable for connection (4),
E* TScript::run: ERROR in TOF execution; resuming...,

for the line
LOAD RESPONSE_INFO BODY ON 4 &
 INTO CaseInfoVS1 &
 ,WITH  "HTML(0)/BODY(1)/FORM(0)/INPUT(3):ATTRIBUTE:value(2)"

Can we say that because of high CPU usage this error is occurred?
Or is there anything I should look for?
Please let me know if anyone having idea?

Thanks & Regards,
Parag Jadhav

Re: [OpenSTA-users] Because of High CPU usage users failed

[vaibhav a. <va...@gm...>]

Hi parag,

This error mostly comes when openSta doesnt find the attribute to be
extracted in the response. i dont think this is happening because of
high CPU usage.

Thanks,
Vaibhav Agarwal
va...@cr...

On 7/5/07, parag jadhav <par...@gm...> wrote:
> Hi,
>
> I am using a server having following specifications:
>
> Processor: Intel Pentium 4, 3 GHz
> RAM : 1GB
>
> I have analyzed performance of a Server using Perfmon while executing
> a script for multiple users (say 10, 50 users)
> and I found that  % Processor Time is above 90 %.
> And I get following errors:
>
> E* HTTPRESPONSE (HTML parser): unresolved variable for connection (4),
> E* TScript::run: ERROR in TOF execution; resuming...,
>
> for the line
> LOAD RESPONSE_INFO BODY ON 4 &
>  INTO CaseInfoVS1 &
>  ,WITH  "HTML(0)/BODY(1)/FORM(0)/INPUT(3):ATTRIBUTE:value(2)"
>
> Can we say that because of high CPU usage this error is occurred?
> Or is there anything I should look for?
> Please let me know if anyone having idea?
>
> Thanks & Regards,
> Parag Jadhav
>
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Re: [OpenSTA-users] Because of High CPU usage users failed

[Daniel S. <da...@Op...>]

Parag Jadhav wrote:
> I am using a server having following specifications:
>
> Processor: Intel Pentium 4, 3 GHz
> RAM : 1GB
> 
> I have analyzed performance of a Server using Perfmon while executing
> a script for multiple users (say 10, 50 users)
> and I found that  % Processor Time is above 90 %.
> And I get following errors:
>
> E* HTTPRESPONSE (HTML parser): unresolved variable for connection (4),
> E* TScript::run: ERROR in TOF execution; resuming...,
> 
> for the line
> LOAD RESPONSE_INFO BODY ON 4 &
>  INTO CaseInfoVS1 &
>  ,WITH  "HTML(0)/BODY(1)/FORM(0)/INPUT(3):ATTRIBUTE:value(2)"
> 
> Can we say that because of high CPU usage this error is occurred?
> Or is there anything I should look for?

Have you checked the FAQ?
There's an entry for this very error:
  http://portal.opensta.org/faq.php?topic=HtmlParserErrors

Also, you don't really make it clear wether it is your Web server or
your load generating server which has high CPU usage - this fact is,
of course, very important.

Cheers
/dan
-- 
Daniel Sutcliffe <Da...@Op...>
  OpenSTA part-time caretaker - http://OpenSTA.org/

Re: [OpenSTA-users] Because of High CPU usage users failed

[Dan D. <ddo...@me...>]

| Parag Jadhav wrote:
| > I am using a server having following specifications:
| >
| > Processor: Intel Pentium 4, 3 GHz
| > RAM : 1GB
| >
| > I have analyzed performance of a Server using Perfmon while executing
| > a script for multiple users (say 10, 50 users)
| > and I found that  % Processor Time is above 90 %.
| > And I get following errors:
| >
| > E* HTTPRESPONSE (HTML parser): unresolved variable for connection (4),
| > E* TScript::run: ERROR in TOF execution; resuming...,
| >
| > for the line
| > LOAD RESPONSE_INFO BODY ON 4 &
| >  INTO CaseInfoVS1 &
| >  ,WITH  "HTML(0)/BODY(1)/FORM(0)/INPUT(3):ATTRIBUTE:value(2)"
| >
| > Can we say that because of high CPU usage this error is occurred?
| > Or is there anything I should look for?

Dan Sutcliffe wrote:
| Have you checked the FAQ?
| There's an entry for this very error:
|   http://portal.opensta.org/faq.php?topic=HtmlParserErrors
| 
| Also, you don't really make it clear wether it is your Web server or
| your load generating server which has high CPU usage - this fact is,
| of course, very important.
| 
In addition to what Dan states/asks, I would add:
1 - Do you get this error on *every* iteration, on single-user or 5 user
test, or only when you get to 50 and see 90% cpu utilization (on either the
target web server of your opensta Commander/load injector)?

2 - If it runs w/o error at "low load" and errors only at "high load" (as I
often see), I conclude that it is a load-related error -- either due to
overwhelming a resource on my load injector or on the web server.  If the
overall level of errors are smallish in number (<1-2% of overall successful
transactions), then I dismiss as "noise" due to imperfections of load
testing tools/environment.  If >2%, and resources on my load injector look
ok, then I conclude that the target server is not able to keep up, and is
not sending back complete html body from which to capture the values I
need--thus identifying a scalability problem on the target environment, to
be diagnosed and fixed.

Any other insights/opinions, gurus?

...Dan Downing
www.mentora.com