Caching for Cash - Part 1
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Transcript of Caching for Cash - Part 1
Caching For Cash
php|tek Chicago, May 2009
Who is Helgi ?Head of R&D at echolibre, pear extraordinaire,published author, party person and an Icelander
Who is Scott ?Works at Jelsoft, php core developer, published author, party person and a Scottish person
What do you use ?
Identify the performance issues
Analyze the issue
Fix the issue
What we want to accomplish today is ...
3 Easy Steps to Remember
Locate
Diagnose
Recitfy
Location is EverythingWebsites have more pages than you think.Performance effects are aggregate.
Mild performance on frequently accessed pages
Bad performance on infrequently accessed pages
Poisoned shared resources Database Buffer CacheNetworketc
Diagnostics Finding the bottlenecks
Script ProfilersAPDXDebug
Benchmarking Tools
abSiegeApache FloodMemtrackXHProf
GUIMarkHardinfoBonnie++
Right mixture of tools for the product
Strained External ResourcesOverloaded databases
Badly configured machines
NFS / File system contention
Solutions:
Get a real system administrator
Pick the right database for the job
Clustered / Proxy databases
Faulty Database RequestsMissing indexes.
Poor schema architecture.
Bad database tuning.
Selecting too many columns / rows
3rd Party Network RequestsProxy callout to external services
Remote PHP includes
REST / AJAX
SOAP / RPC calls
Solutions:
Cache the network calls
Design your AJAX so you can easily cache it
Expensive ProcessingImage manipulation
Encryption
system/exec/etc. function calls
Solutions
Off load work to other machinesGearman and similar are your friends
Bad Algorithm DesignPerforming extensive looping text replacements
Performing extensive looping in general
Badly written Regular Expressions
Extensive recursive functionality
Go forth and make it faster! Questions ?
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