Great Caching Disasters! (and how to avoid them)

Transcript

1. 1.

   Great Caching Disasters!!! And how to avoid them.

2. 2.

   About me Lisa van Gelder VP of Engineering at Stride

   lisa@stridenyc.com @techbint
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   The case of the disappearing website

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   Lessons • If caching is important, monitor it! • Never

   build a cache invalidation system
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   Keep caching simple

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   Cache for the smallest amount of time you can get

   away with
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   So we built a 3-day cache

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    Fix your sql! Don’t cover up terrible queries with caching.

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    Cache for 1 minute

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    <div class="comment__timestamp"> <!-- microapp-href name="discussion" url="/comment- permalink/51075599" —> ... </div>

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    Only cache static content

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    Caching should be automatic

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    Epilogue

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    Lessons • Cache for 1 minute • Cache static content

    • Never build a clear cache system!* * Unless you are a cdn