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Optimizing Drupal PerformanceTips and Tricksby Tim Kamanin@timonwebtimonweb.commailto:timur@kamanin.comDrupalCamp Wroclaw 2013

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About me- Freelance Drupal consultant- Working with Drupal since 2006- Started my journey from building own projectson Drupal- Share Drupal knowledge at timonweb.com- Co-founder of Drupal Trójmiasto Users Group(Gdańsk / Sopot / Gdynia, 3drupal.pl)- Creator of Dropbucket.org – Drupal snippetsrepository

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What is Performance?Performance refers to how long does it take toproduce a page.It is a result of how long it takes to render apage on the server and on the client side in thebrowser.

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Why do we care about it?PerformanceisLove and Money

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THE HORRIBLETRUTH ABOUTDRUPAL IS...

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Photo by Chris Hoving

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Drupal is● Database intensive● Memory intensive● Can easily become a resource hog

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Reasons why most Drupalsites are slow:● doing full page renders● serving dynamic content to anonymoususers● slow mysql queries● module bloat aka „open buffet” syndrome

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Typical Drupal StackLinuxCSS / JavaScriptApache MySQL PHPDrupalMedia

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Drupal PerformanceTips and Tricks

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1. Know the Tools

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Devel

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Developer Tools in abrowser

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● Pingdom● YSlow● Apache benchmark● XHProf● top / htop● New relic● mytop / mtop● PhpMyAdmin● And lots moreKnow the Tools

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2. Limit number ofinstalled modules

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3. Always check whatinstalled modules are doingbehind the scenes

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- take advantage of caching(drupal_static(), cache_set(),cache_get())- split ui part and functional part- take advantage of Drupals AjaxFramework- Use Drupal API!!!4. Develop modules with performancein mind:

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5. Enable css / javascriptaggregation:● built in● aggregate cache module

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6. Cache PHPwith APC

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7. Export views andPanels to code

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8. Enable fast_404

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9. Remeber, cachesaves the cash! Cacheeverything!

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10. Enable page cacheand page compression(mod_deflate)

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11. Install Boost to makeanonymous caching 100 x timesfaster or play with Varnishand make things even faster!

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12. Enable views andblock caching forauthorized users

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13. Consider using ESI andauthcache to cache pages forauthorized users.WARNING: This solution is forexperienced users.

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14. Store cache inmemory. Installmemcached or redis

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15. Tune SQL- find slow queries- use indexes- use EXPLAIN on queries

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16. Tune MySQL:Tweak my.cnf:- query_cache_size – caches query results(32M - 512M)- innodb_buffer_pool_size – caches indexes.Up to 80% of your memory- table_cache – number of tables mysql keepsin cache. Start with 1000- tmp_table_size and max_heap_table_size

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● StartServers - number of child server processescreated at startup (default 5)● MinSpareServers - minimum number of idle childserver processes (default is 5)● MaxSpareServers – maximum number of idle processes(default is 10)● MaxClients - maximum number of connections that willbe processed simultaneously, otherwise queued (default256)● KeepAlive. On / Off depending on circumstances17. Tune Apache:

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18. Separate Media and Code● Move media to CDN● Move media to separateserver

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19. Move search fromDatabase to Solr search_api+ Solr

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20. Optimize, measureand repeat!

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Comments,questions?@timonwebtimonweb.commailto:timur@kamanin.com