I have varnish 3, with apache worker/php-fpm, and drupal 7.
Varnish is using high IO and I suspect this has to do with multiple repeated messages like
0 Debug - "lurker: 0xb7505470 1800 0"
when I run varnishlog.
What is this about and how I can fix this issue?
I use ubuntu 11.10, apache2 with varnish, php5-fpm and xcache. I have 512mb ram with 4 cpus. linux kernel version 3.
What are the optimal xcache settings?
Should I make also some changes and settings also at my kernel/system to allow it have more memory size than the default 16?
Optimizing page load speed practices include to load static assets, like images, css, js, from subdomains, so to increase performance, by using cookieless domains, but most importantly by having parallel downloads from the browser.
I use varnish reverse cache in front of my webserver which serves various websites.
How I can instruct varnish to rewrite url for static files (css,js,png,jpg,jpeg,gif), so they are served by a subdomain? So if someone asks for domain.com/image.png this to be finally served from static.domain.com/image.png. Domain and subdomain are served from the same server. Varnish already connect to the backend at 127.0.0.1
Is it more efficient to do the url rewriting at varnish or at the backend (apache)? I think it would be faster to be done in varnish, since it's at the frontline, right?
What is the way to do the same in apache?