Re: [Jcaptcha-users] creating many images at a time taking lots of CPU Utilization.(Stress testing)

[<ant...@gm...>]

Hi Sivamma, Captcha generation is very CPU consumming by nature, for both
image and sound.
In order to manage this issue, JCaptcha provide a buffering system, please
take a look at this new documentation page :
http://forge.octo.com/jcaptcha/confluence/display/general/Captcha+Buffering=
+System

To resolve the JavaHeapSpace, adjust the following JVM options : -Xms128m
-Xmx256m -XX:PermSize=3D128m -XX:MaxPermSize=3D256m

Regards
Antoine

On 6/25/07, siva kempili <k_s...@ya...> wrote:
>
> Hi ,
>   Creating Images are working fine.
> The problem i am facing is CPU Utlization is
> more(nearly 80-90%), When there are many requests for
> the servlet which creates jcaptcha image.I am trying
> to send nearly 60 requests from different client
> machines atthe same time.During that time the CPU
> utilization of the server reaches 80 to 90% and
> remains till it finishes.In between it throws error
> "java.lang.OutOfMemoryError: Java heap space"
>
> Can you please why it uses lots of CPU Utilization and
> what is the solution for that.
>
> Can you please tell me is there a way to generate many
> jcaptcha images(something like 1000/1500) in a
> directory and display those images when the client
> request for jcaptcha image.I tried that but the
> problem is storing sessionid for validation.If i save
> many images in a directory and want to use means ,i am
> not able to validate them.
>
> How can i handle validation in that case.
>
> Its little urgent please.
> Thanks in advance.
>
> Thanks & Regards,
> Sivamma.
>
>
>
>
>
>
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--=20
Antoine V=E9ret
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Fixe : 09.53.07.73.76