Debug varnish
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This document provides an overview of debugging techniques for the Varnish caching software. It discusses gathering system data using Varnishgather, possible problems relating to stability, functionality, operations and capacity, and Varnish tools like Varnishtest, Varnishncsa and Varnishstat that can help with debugging. The presentation encourages attendees to get hands-on with these tools and asks them to identify a repeated sentence for a chance to win chocolate.
Debug varnish
- 2. DEBUG HOW-TO
- 3. Arianna Aondio Field Engineer WHO AM I? ● Email: arianna.aondio@varnish-software.com ● Twitter: aondio_ ● Github: aondio
- 4. AGENDA ● get the data ● possible problems ● which Varnish tools ● hands-on
- 5. There is a sentence appearing more than once within this presentation. Find out which one and win CHOCOLATE!
- 6. GET THE DATA
- 7. VARNISHGATHER # wget https://raw.githubusercontent.com/varnish/varnishgather/master/varnishgather # sudo sh ./varnishgather gathers stats, metrics and facts about your system in a .tar.gz archive
- 9. STABILITY Crash, panic or something else? Get yourself a coffee, relax, take your time and get your hands dirty
- 10. FUNCTIONAL Code not reached? Wrong logic or expectations? We have tools!
- 11. OPERATIONAL Low hitrate? High response times? We have tools!
- 12. CAPACITY Cache too small? Wrong number of threads? We have tools!
- 13. TOOLS
- 15. HANDS-ON
- 16. Q & A