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From Peter Lin <>
Subject Re: JMeter and SSL = slow
Date Fri, 04 Feb 2005 13:51:32 GMT
glad it was caused by the cert and you were able to fix it.

unless you stress the server, I doubt you'll see a difference. Many of
the larger E-Commerce sites use bigIP or a SSL enabled router. The
webserver only handles HTTP traffic and the router does all the
encryption. I may have the old numbers Remy and I ran back in 2002. If
I find them, i'll post it.


On Fri, 04 Feb 2005 14:46:48 +0100, Thomas Keller
<> wrote:
> Peter Lin schrieb:
> > keep in mind that SSL is heavy weight. By heavy weight I mean this.
> > 450mhz cpu - handles 5-8 concurrent SSL/HTTPS requests, but maxes out cpu
> > 2.0ghz cpu - handles 20-25 concurrent SSL/HTTPS requests, but maxes out cpu
> See my previous post... the problem disappeared by now. The long load
> times happened with only one thread running on a 2.4GHz P4 while the
> load on the server machine was not even noticable.
> > in general, if you're testing SSL, make sure the sampler isn't set to
> > download the images and other embedded resources.
> Yep, I've disabled that anyways.
> > I've done quite a
> > bit of testing in the past on the performance difference between HTTPS
> > vs HTTP. You're lucky if the req/sec only drops half. More often than
> > not, depending on how many images you have, it may be 3-5x slower.
> > most large E-commerce sites use hardware accelerators for this reason.
> > IBM, Rainbow technologies and several other companies sell SSL enabled
> > ethernet cards or network attached SSL. Most routers today offer SSL
> > acceleration, so my advice is to not use software SSL. hope that helps
> We've been discussed this issue lately, too, and I'm feeling not too
> comfortable using mod_ssl and no hardware accelerated SSL, but as always
> my bosses will not invest in such a thing unless they'll see the current
> system go down under the heavy load.
> Thanks for your response.
> --
> Best regards | Mit freundlichen Grüßen
>         Thomas Keller.
> inatec solutions GmbH, Public Key 0x94A5F429
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