Caching strategy and apc
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This document discusses caching strategies and the Alternative PHP Cache (APC). It introduces different caching strategies such as where to cache, what to cache, and how long to cache. It also discusses APC which is a free PHP extension that acts as an opcode cache and supports user data caching. The document provides instructions on installing and configuring APC, and tips for using it effectively such as caching strings over arrays and using long time to live settings to avoid fragmentation. Case studies are presented showing how caching can optimize feed systems.
![2.3. PHP.INI extension=/home/path/to/apc.so [apc] apc.enabled = 1 apc.cache_by_default= 0 apc.shm_segments=1 apc.optimization=0 apc.shm_size= 128 apc.ttl= 7200 apc.user_ttl= 7200](https://image.slidesharecdn.com/cachingstrategyandapc-110724070052-phpapp01/85/Caching-strategy-and-apc-14-320.jpg)
Caching strategy and apc
- 1. Caching Strategy & APC Vo Duy Tuan - CEO/Founder From the PHP developer view
- 2. $who_am_I? My Name is Võ Duy Tuấn PHP 5 Zend Certified Engineer Interests: PHP, Social Network, Optimize Web Works: Reader.vn CEO/Founder Trainer Freelancer Help customer Optimize & Speed up website
- 4. 1.1. Web Caching Introduction
- 5. 1.2. Cache Strategy Heavy load page/module HIT & MISS ratio. Budget & Technology AJAX SEO friendly Seperating to small tactics Cache WHERE ? Cache WHAT ? Cache HOW LONG ?
- 7. 1.2.2. Cache WHAT? File Code Query Result Object Array String Number …
- 8. 1.2.3. Cache HOW LONG? Cache Clear Type: Never Expired Normal Expired Force Expired “ More time caching, less real time data.”
- 9. Which cache do you HATE most?
- 10. Alternative PHP Cache - APC 2
- 11. 2.1. What is APC? Free PHP Extension PHP Opcode cache Support User data cache Run on SAME machine with PHP NOT support multi servers
- 13. 2.2. APC Installation On linux: pecl install apc On Windows: Download apc DLL file to PHP extension directory such as php_apc.dll
- 14. 2.3. PHP.INI extension=/home/path/to/apc.so [apc] apc.enabled = 1 apc.cache_by_default= 0 apc.shm_segments=1 apc.optimization=0 apc.shm_size= 128 apc.ttl= 7200 apc.user_ttl= 7200
- 15. phpinfo()
- 16. 2.4. APC Monitor
- 19. 2.5. APC Using
- 21. 2.6. APC Tip Opcode your web code only Disable APC for PhpMyAdmin <Directory "/mysite/public_html/"> ... php_admin_flag apc.cache_by_default On </Directory <Directory "/mysite/public_html/ phpmyadmin/ "> ... php_admin_flag apc.cache_by_default Off </Directory>
- 22. 2.6. APC Tip.. Cache STRING is better than ARRAY Long Time To Live better than Short Case study: Caching for Feed System:
- 23. BEFORE
- 24. BEFORE
- 25. ANALYSE
- 26. AFTER
- 27. Short TTL make fragmentation
- 28. Short TTL make fragmentation
- 29. It’s time to query … Thanks you!