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Caching for Performance

Caching for Performance. Jeff Tapper Tapper.net Consulting. Agenda. What is Caching Why is Caching important Where can I implement caching What to Cache within CFMX How to Cache within CFMX Summary. What is Caching. A Cache is a place where something is temporarily stored

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Caching for Performance

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  1. Caching for Performance Jeff Tapper Tapper.net Consulting

  2. Agenda • What is Caching • Why is Caching important • Where can I implement caching • What to Cache within CFMX • How to Cache within CFMX • Summary

  3. What is Caching • A Cache is a place where something is temporarily stored • By storing frequently used items, the need to recreate them is mitigated

  4. Why is Caching Important • Each operation a server performs takes time / resources • By reducing the number of operations any server performs, we increase the ability for that server to handle more requests • Faster Page Loads • Increased Scalability

  5. Places to Cache • Database • ColdFusion • Web Server • Network

  6. Places to Cache • Network Diagram

  7. What to Cache in CFMX • Data • CFC instances • Webservices • Pages • Content

  8. What to Cache in CFMX Data • Caching common queries can greatly increase speed pages are built • Reduces network traffic between CFMX and Database

  9. What to Cache in CFMX CFCs • CFCs are the new core building block of CFMX applications • Instantiation of CFCs is an expensive (slow) process

  10. What to Cache in CFMX Webservices • Calling a webservice invokes a complex process. • Requests WSDL, parses it, makes calls to methods • Caching WSDL reduces over all processing time 3-5x

  11. What to Cache in CFMX Pages • Many applications have entire pages which do not change frequently • Caching the entire page can reduce time needed by CFMX • In some cases, pages can be cached as HTML, removing the need for CFMX to process it at all

  12. What to Cache in CFMX Content • Often, even in pages which are not static, many sections of the page are. • Caching the static parts of the page reduces the time CFMX needs to build the page.

  13. Data Caching in CFMX • Cached Within • Cached After • Storing query in shared scope variables

  14. Benefits Great for dynamic queries Easy to implement Built in Timeout Drawbacks Purging non-trivial Data Caching in CFMX Using CFQUERY attributes to Cache

  15. Benefits Easy to Manage Not limited by “Max Number cached queries” Drawbacks Not well suited for dynamic queries More Complex implementation Lacks built-in timeout Data Caching in CFMX Query Caching in a shared scope

  16. CFC Caching in CFMX • Storing instances in shared scope variables • Page Context Bug

  17. Webservice Caching in CFMX • CFMX automatically caches WSDL

  18. Page Caching in CFMX • Trusted Cache • CF_SuperCache • Custom Built Solutions

  19. Caching content in CFMX • CFCACHE • CFSAVECONTENT

  20. Summary • Effective use of caching can greatly extend the scalability of an application • Every application offers a myriad of caching possibilities • Caching opportunities exist both within and outside the CFMX server

  21. Questions ?

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