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SCALING WORDPRESS with Zack Tollman

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Slashdot effect Digg effect Reddit effect Farked Drudged

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Dinner

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Celebration

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Phone rings

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Not at dinner

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https://flic.kr/p/pLarbf

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Triage approach to scaling

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Stabilize

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Diagnose

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Treat

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Prevent

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PAGE CACHING Stabilize with

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WordPress as a Static Site https://flic.kr/p/6bun5f

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https://medium.com/message/how-paper-magazines-web-engineers-scaled-kim-kardashians-back-end-sfw-6367f8d37688 #breaktheinternet

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Reduce Site Load

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Batcache

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Varnish

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Edge Caching

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Tips Low TTL to avoid invalidation pains

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EXPERIENCE & TOOLS Diagnose with

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Database Queries

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Remote Requests

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Slow Methods

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Query Monitor

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Query Monitor

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XHProf/XDebug

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New Relic

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OBJECT CACHING Treat with

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https://flic.kr/p/bxuzPB

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WP_Object_Cache tollmanz.com/grokking-the- wp-object-cache/

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Memcached github.com/tollmanz/ wordpress-pecl-memcached- object-cache

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APC wordpress.org/plugins/apc/

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WordPress core uses object caching

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wp_cache_set

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wp_cache_get

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$args = array(
 'number' => 5,
 'username' => 'tollmanz',
 'include_rts' => false,
 );
 
 $key = md5( $args );
 $group = 'tweets';
 
 $tweets = wp_cache_get( $key, $group );
 
 if ( false === $tweets ) {
 $tweets = get_tweets( $args );
 wp_cache_set( $key, $tweets, $group, 600 );
 }

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On Demand

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Proactive

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Proactive On save

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Proactive On scheduled event

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Stale While Revalidate github.com/markjaquith/ WP-TLC-Transients

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Stale While Revalidate Liveblog

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A SOLID STACK Prevent with

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Edge Network

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Edge Network Load Balancer

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Edge Network Load Balancer Varnish Varnish

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Edge Network Load Balancer Varnish Varnish WEB WEB WEB WEB

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Edge Network Load Balancer Varnish Varnish WEB WEB WEB ADMIN

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Edge Network Load Balancer Varnish Varnish WEB WEB WEB ADMIN DB MEM DB MEM

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Object cache + Page cache ——————— Happy life

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Zack Tollman @tollmanz tollmanz.com/mwphp15