pass uses higher cpu than hit
reader_1000 at hotmail.com
Wed May 20 19:20:15 CEST 2015
> From: reader_1000 at hotmail.com
> First, I am making requests to page which Varnish caches and CPU usage of Varnish is around 17% on average:
> Second, I am making requests to page which Varnish passes to the backend since it is a static page and I cannot purge it timely when it changes therefore I prefer Varnish not to cache it. However, for this scenario CPU usage of Varnish is around 78% on average:
> It seemed a little bit strange to since I directly pass the request to the backend without any additonal processing. Could you please help me to find the reason? Where should I look for: operating system, backend, Varnish parameters?
Has anyone experienced a similar issue? Is it related to tcp connection establishment cost? What is the recommended keepalive value for backend which resides on the same machine with Varnish?
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