Varnish

Documentation

• Basics & Tutorial
  • https://ma.ttias.be/varnish-explained/ ( copy )
• Varnish States
  • https://varnish-cache.org/docs/trunk/reference/states.html
• Built-in subroutines
  • https://varnish-cache.org/docs/7.1/users-guide/vcl-built-in-subs.html
• VCL Variables
  • https://varnish-cache.org/docs/7.5/reference/vcl-var.html
• Hit-for-miss explanation
  • https://www.varnish-software.com/developers/tutorials/varnish-builtin-vcl/#hit-for-miss

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• Hashing https://varnish-cache.org/docs/trunk/users-guide/vcl-hashing.html
• Shared Memory Logging
  • https://varnish-cache.org/docs/3.0/reference/vsl.html (TTL explain)
• https://kly.cloud/posts/2010_01_26__Varnish_best_practices__.html
• https://kly.no/varnish/regex.txt
• https://ma.ttias.be/mark-varnish-backend-healthy-sick-automatic-via-cli/
• https://developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/http-caching
• https://feryn.eu/blog/varnishlog-measure-varnish-cache-performance/#The_TTL_tag

Useful commands

• varnishlog -q request - shows the most detailed logs
• varnishadm param.show default_ttl - show configuration