<div dir="ltr">Hi Simon,<div><br></div><div>With regards to CPU, Varnish doesn't need that much. Typically, you'll have maybe 5 or 10% CPU utilisation on a modern machine running at 5000 requests a second.</div><div>
<br></div><div>The memory is completely dependent on the site you are about to cache. Most websites are pretty small in terms of content size so 96GB should be more than sufficient to keep most of the website in memory, unless you have video content. Even then, 96GB is quite a lot.</div>
<div><br></div><div>The bans will add a bit of CPU use to Varnish and might induce a bit of latency if you'll have a lot of them. The CPU usage is a factor of (no of bans) x number of objects in cache as every ban will have to be matched against every object in cache. CPUs are fast, so this might not be as bad as it sounds.</div>
<div><br></div><div>Per.</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jan 27, 2014 at 12:45 PM, Simon Lennon, OnCommerce Ltd. <span dir="ltr"><<a href="mailto:simon.lennon@oncommerce.co.uk" target="_blank">simon.lennon@oncommerce.co.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hi guys, I was wondering what kind of processing power varnish needs. I
am setting up a dedicated environment with a custom built VCL which
includes some regexp and the load balancing functionality.<br>
<br>
I was going to setup a dual core server with 96GB of ram, is this enough
for a HIGH traffic site, says 10,000 hits a second with very high cache
utilization?<br>
<br>
I will also be using the ban list to achieve a very high level of
caching, with a daily restart to flush the archive, but I would expect
several hundred regex patterns per day in the ban list.<br>
<br>
I know varnish is optimized for performance so I wasn't sure how much
processing power it would need,<br>
<br>
thanks,<br>
<div>-- <br>
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<p><strong><span style="font-size:14.0pt;font-family:"Arial","sans-serif";color:#004c77">Simon Lennon</span></strong> <span style="font-size:10.5pt;font-family:"Arial","sans-serif""><br>
Technical Director</span> <span style="font-size:10.5pt;font-family:"Arial","sans-serif""><u></u><u></u></span></p>
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</span>OnCommerce Ltd.<br>
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