I have a Rackspace Cloud server running Ubuntu 9.10 (1GB of RAM, Quad-Core AMD Opteron Processor 2374 HE, I believe it's 64bit) specifically JUST to run Varnish for a festival website. It's fast enough for most of the year, but for about 3 weeks it gets pretty loaded and I want to make sure that the site survives without issues this year. It's mostly static information so pretty easy to cache.
Varnish 2.1 is compiled from this dsc file: http://archive.ubuntu.com/ubuntu/pool/universe/v/varnish/varnish_2.1.0-2.dsc I have 2 questions: 1. I know that I'm doing something wrong with my vcl file - what I want is this: 5 minute TTL for all content (regardless of headers) - as long as the backend is healthy 1 hour TTL for all content if the backend is sick (500 error, not responding, etc) I've tried what's referenced here: http://varnish-cache.org/wiki/VCLExampleGrace http://varnish-cache.org/wiki/BackendPolling And it didn't seem to work - some content gave out a 50x error RIGHT away when I took the test backend down and other content worked for 5 minutes and then gave 50x errors. Here was that vcl: http://gist.github.com/380966 Here's my current vcl (with hostnames obscured sorry): http://gist.github.com/380942 I know it's wrong - can somebody point out what I'm missing? I've messed with it for a while now and just can't seem to get it to do what I want. 2. I stress tested that server overnight hit 479M pageviews which will be much higher than I need - I basically ran these two commands in a loop: ab -n 10000 -c 100 http://varnish.nonfiction.ca/ wget -q -A *.html -r http://varnish.nonfiction.ca/ NOTE: High levels of single page traffic on this site, it exists to serve out lots of homepage traffic and very low levels of anything else. All external images/CSS and JS files will be served via CDN. Varnishstat at the end of the run: http://drp.ly/TEvcv Here's the munin details: http://drp.ly/TEzd0 My only concern is the amount of committed memory - should it be rising that high? After I killed varnish - the committed memory went back down: http://drp.ly/TFtdx Do I need to put a manual restart of Varnish into my crontab to free that up? Any responses/links/etc. would be great - thanks. _______________________________________________ varnish-misc mailing list [email protected] http://lists.varnish-cache.org/mailman/listinfo/varnish-misc
