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High Performance WordPress - WordCamp Jerusalem 2010
- 1. High Performance WordPress WordCamp Jerusalem September 5, 2010
- 2. About Me BarryAbrahamson Systems Wrangler, Automattic http://barry.wordpress.com/contact-me/
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- 4. WordPress.com Launched inAugust 2005
- 5. WordPress.com Launched inAugust 2005 ~13.5 million sites and 16 million users today
- 6. WordPress.com Launched inAugust 2005 ~13.5 million sites and 16 million users today Over 2 billion HTTP requests per day
- 7. WordPress.com Launched inAugust 2005 ~13.5 million sites and 16 million users today Over 2 billion HTTP requests per day Billions of MySQL queries per month
- 8. WordPress.com Launched inAugust 2005 ~13.5 million sites and 16 million users today Over 2 billion HTTP requests per day Billions of MySQL queries per month 500TB of bandwidth per week
- 9.
- 10. What is Performance? Speed - Serve each request as quickly as possible
- 11. What is Performance? Speed - Serve each request as quickly as possible Scaling - Serve many concurrent requests
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- 14. Speed Server Generatingthe content
- 15. Speed Server Generatingthe content Client
- 16. Speed Server Generatingthe content Client Downloading
- 17. Speed Server Generatingthe content Client Downloading Parsing
- 18. Speed Server Generatingthe content Client Downloading Parsing Displaying
- 19. Speed Server Generatingthe content Client Downloading Parsing Displaying
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- 21. Client Side Performance 80%+ of the total load time
- 22. Client Side Performance 80%+ of the total load time Tools
- 23. Client Side Performance 80%+ of the total load time Tools YSlow - http://developer.yahoo.com/yslow/
- 24. Client Side Performance 80%+ of the total load time Tools YSlow - http://developer.yahoo.com/yslow/ Page Speed - http://code.google.com/speed/ page-speed/
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- 26. Client Side Performance Reducenumber of HTTP Requests
- 27. Client Side Performance Reducenumber of HTTP Requests Compress (gzip)
- 28. Client Side Performance Reducenumber of HTTP Requests Compress (gzip) Optimize images (resize, pngcrush, jpegtran)
- 29.
- 30. Server Side Performance Moreimportant than client side performance
- 31. Server Side Performance Moreimportant than client side performance Tools aren’t as advanced / fancy as client tools
- 32.
- 33. Server Side Performance Possibleproblems
- 34. Server Side Performance Possibleproblems Slow database queries
- 35. Server Side Performance Possibleproblems Slow database queries PHP (CPU)
- 36. Server Side Performance Possibleproblems Slow database queries PHP (CPU) Network
- 37. Server Side Performance Possibleproblems Slow database queries PHP (CPU) Network Tools
- 38. Server Side Performance Possibleproblems Slow database queries PHP (CPU) Network Tools WordPress Plugins - Search for “debug”
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- 44. Server Side Performance Tools MySQL Slow query log
- 45. Server Side Performance Tools MySQL Slow query log http://www.maatkit.org/doc/mk-query-digest.html
- 46. Server Side Performance Tools MySQL Slow query log http://www.maatkit.org/doc/mk-query-digest.html Strace / lsof / gdb
- 47. Server Side Performance Tools MySQL Slow query log http://www.maatkit.org/doc/mk-query-digest.html Strace / lsof / gdb Many times plugins are the culprit.
- 48. How can Iimprove performance?
- 49.
- 50. As a User Makesure you are running the latest WordPress!
- 51. As a User Makesure you are running the latest WordPress! Constant performance improvements being made. Many from things found on WordPress.com
- 52. As a User Makesure you are running the latest WordPress! Constant performance improvements being made. Many from things found on WordPress.com Show a reasonable number of posts per page. 10-25 seems to be good
- 53. As a User Makesure you are running the latest WordPress! Constant performance improvements being made. Many from things found on WordPress.com Show a reasonable number of posts per page. 10-25 seems to be good Monitor site performance
- 54.
- 55. As a Sysadmin Opcodecache (APC)
- 56. As a Sysadmin Opcodecache (APC) Caching plugins (Batcache, WP super cache)
- 57. As a Sysadmin Opcodecache (APC) Caching plugins (Batcache, WP super cache) Make sure you are running the latest PHP
- 58. As a Sysadmin Opcodecache (APC) Caching plugins (Batcache, WP super cache) Make sure you are running the latest PHP HipHop
- 59. As a Sysadmin Opcodecache (APC) Caching plugins (Batcache, WP super cache) Make sure you are running the latest PHP HipHop Apache + mod_php < Nginx + php-fpm.
- 60.
- 61.
- 62. Real World Numbers APC Empty cache - 33.5 MB RAM
- 63. Real World Numbers APC Empty cache - 33.5 MB RAM Primed cache - 6.2 MB RAM
- 64. Real World Numbers APC Empty cache - 33.5 MB RAM Primed cache - 6.2 MB RAM 60% reduction in CPU utilization ( 2160 CPUs )
- 65. Real World Numbers APC Empty cache - 33.5 MB RAM Primed cache - 6.2 MB RAM 60% reduction in CPU utilization ( 2160 CPUs ) PHP 5.3.3 10% CPU reduction ( 360 CPUs )
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- 67.
- 68. Real World Numbers HipHop 40% faster ( http://huichen.org/en/2010/06/ wordpress-3-benchmark/ )
- 69. Real World Numbers HipHop 40% faster ( http://huichen.org/en/2010/06/ wordpress-3-benchmark/ ) 270% faster ( http://huichen.org/en/2010/06/ wordpress-3-benchmark-part-2/ )
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- 71. Apache + mod_php 1request requiring php Using mod_php, php is loaded for every request even if not needed Most scaling problems are because of this
- 72.
- 73. As a Developer Onlyperform write operations when needed. Example is flushing rewrite rules on every page load
- 74. As a Developer Onlyperform write operations when needed. Example is flushing rewrite rules on every page load Use WordPress functions when possible.
- 75.
- 76. WordPress.com ~ 1100servers in 3 datacenters ~ 450 web servers (8 CPU cores) ~ 400 database servers (lots of SSDs) ~ 75 memcached servers (800GB of RAM)
- 77.
- 78. Scaling Tips Most things you do to scale WordPress apply to any web app
- 79. Scaling Tips Most things you do to scale WordPress apply to any web app If your bottleneck is the database, something is wrong
- 80. Scaling Tips Most things you do to scale WordPress apply to any web app If your bottleneck is the database, something is wrong Measure twice, cut once, measure again
- 81. Scaling Tips Most things you do to scale WordPress apply to any web app If your bottleneck is the database, something is wrong Measure twice, cut once, measure again Don’t optimize if you don’t need to
- 82.