Reducing CPU usage

[Simon Lyall]

I wrote a little article on reducing CPU usage in my varnish cache that 
some may find useful:

http://blog.darkmere.gen.nz/2012/12/speeding-up-varnish-cache/

The TLDR is that my vcl_recv was poorly structured and every request went 
though around 32 "if" statements (some with huge regex matches). I was 
seeing my CPU maxed out at just 4-5000 hits/second. I restructured 
vcl_recv to reduce the average amount number of tests on each request and 
halved the CPU used.

-- 
Simon Lyall  |  Very Busy  |  Web: http://www.darkmere.gen.nz/
"To stay awake all night adds a day to your life" - Stilgar | eMT.