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High Performance WordPress Barry Abrahamson Matt  Mullenweg July 22, 2007 WordCamp 2007 – San Francisco, CA
The Problem <ul><li>Serve as many users as possible with a reasonable amount of resources </li></ul>
Un-tuned LAMP Stack <ul><li>Linux, Apache 2, PHP 4 or 5, MySQL 4.1 or 5.0 </li></ul><ul><li>8 requests/sec </li></ul><ul><...
Alternative PHP Cache (APC) <ul><li>http://pecl.php.net/package/APC </li></ul><ul><li>12 requests/second </li></ul><ul><li...
WP-Cache <ul><li>http://mnm.uib.es/gallir/wp-cache-2/ </li></ul><ul><li>300 requests/sec </li></ul><ul><li>25,920,000 page...
Apache Alternatives <ul><li>High concurrency </li></ul><ul><li>Majority (90%) of requests on a page are static </li></ul><...
PHP 5 – Just for fun <ul><li>Same as PHP 4 without APC </li></ul><ul><li>Same as PHP 4 with APC 3.0.14 </li></ul><ul><li>U...
When one isn’t enough <ul><li>Move the database to a second server (or 50) </li></ul><ul><li>HyperDB </li></ul><ul><li>Loa...
HyperDB
Load Balancing <ul><li>Hardware or software? </li></ul><ul><li>Pound </li></ul><ul><ul><li>http://www.apsis.ch/pound/ </li...
Caching <ul><li>Memcache </li></ul><ul><ul><li>http:// www.danga.com/memcached / </li></ul></ul><ul><li>Varnish </li></ul>...
WordPress.com <ul><li>Over 1.2 million blogs </li></ul><ul><li>10+ million pageviews/day (dynamic) </li></ul><ul><li>40+ m...
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WordPress.com <ul><li>Over 1.2 million blogs High Performance WordPress

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WordPress.com Over 1.2 million blogs 10+ million pageviews/day (dynamic) 40+ million hits/day (static + dynamic) 7,000+ database queries/second 80,000+ memcache calls/second http://wordpress.com/stats/

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