About choosing the right instance type for Varnish in AmazonEC2

Albert Tollkuçi albert.tollkuci at gmail.com
Fri Mar 10 13:02:05 CET 2017

Hi Jordi,
I'm running it on t2.medium for several websites totaling 200k+ pageviews
per day and it's running great.


On Fri, Mar 10, 2017 at 10:58 AM, Jordi Llach <jllach at agilecontents.com>

> Hi guys,
> any suggestion choosing an Amazon EC2 instance type for Varnish ?
> I stumbled upon this doubt/question because we are currently using
> "m3.medium" which only has 1 CPU and as stated in the docs Varnish assumes
> at least 2 CPU
> https://varnish-cache.org/docs/4.1/reference/varnishd.html#thread-pools
> The performance feeling that we have is exactly the one cited in the docs
> "...more than one pool for each CPU is most likely detrimental to
> performance"
> Should I decrease this value to 1 or better use another instance type.
> In the latter we could upgrade to m3.large(same kind of instance type but
> with 2 CPU) or switch to other types : more CPU optimized and less RAM
> optimized (c3.large or c4.large)
> Any experience/suggestion will be highly appreciated
> Thanks
> Jordi
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