News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

PurpleRockScissors.com:
Avoiding Cache Stampedes with Pseudo-Locks
October 22, 2010 @ 11:14:25

In this quick post to the Purple Rock Scissors blog, there's a suggestion from Rob Zienert about how you can avoid a "cache stampede" on your site's caching tool with the help of a pseudo-lock on the record.

A cache stampede occurs when a cached item expires and multiple clients attempt to repopulate the cache at the same time. Take for example a page cache expires and a few thousand people try to refresh the generated HTML. That's a lot of instant load - hitting the database, re-saving the cache and so-on: it's a lot of extra processing that can bring a website to its knees. One of the many ways to avoid this from happening is to apply pseudo-locks to a cache (and works great with Memcache).

He includes a code snippet example showing how to create the lock using a Zend_Cache setup by looking for a URI-based lock file and setting a "locked" value to true when someone else is using it.

0 comments voice your opinion now!
lock cache memcache zendcache tutorial


blog comments powered by Disqus

Similar Posts

Zend Developer Zone: Using the Stack Exchange API with PHP (part 2)

Brian Swan's Blog: Getting Started with PHP and SQL Azure

PHPBuilder.com: Building RESTful APIs with the Slim Microframework

IBM developerWorks: Paint 3-D images with PHP

Brandon Savage's Blog: Caching For Efficiency With Zend Framework


Community Events

Don't see your event here?
Let us know!


unittest community api php7 version library podcast framework language laravel laravel5 release voicesoftheelephpant introduction security development extension interview series opinion

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework