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From Tim Koopmans <>
Subject Re: default JMeter caching
Date Wed, 03 Sep 2014 22:01:45 GMT
You might find our blog post on this useful:

You might also want to double check your varnish config (and that it is
actually caching responses from the backend / origin servers). I like to
add debug headers so you can view hit/miss stats from the client -- see
slide 25 in my presentation here -- sometimes
other things can cause varnish not to cache, like presence of cookies in
the request headers etc.

Then you can manually verify what JMeter is or isn't doing with a view
results tree listener in the GUI first -- before running an actual load
test with listeners disabled etc.


Tim Koopmans
+61 3 9221 6309

[image: Flood IO Pty Ltd] <>

Level 27, 101 Collins Street
Melbourne, Vic 3000

On Thu, Sep 4, 2014 at 2:25 AM, <> wrote:

> Hi,
> I'd like to understand a little a bit about default JMeter caching.
> I have a site behind Varnish caching. However, when I ran the tests
> through Varnish and by bypassing Varnish the results were similar. It
> was only when I added: "cache-control: no-cache" (in the non-Varnish
> tests) to the request header that I received slower response times
> I wonder why this is, and if JMeter is caching locally?
> Many Thanks
> Paul
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