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Caching is essentially a way of keeping the most used parts of a website in memory so that it gets served quickly. This will reduce CPU and I/O overhead and thus make the site very fast. Unfortunately this doesn't happen magically without some extra work.
This talk will cover the several layers that you should know about how they improve the sites speed. Some of these will include:
I will also go over how we utilize caching on the Drupal infrastructure which is hosted at the OSL along with other real world examples.
A number of open source tools exist that make profiling Linux servers easier. These tools include traditional Unix utilities like "sar" and "iostat", but they also include some tools that go deep into the processors and I/O subsystems.
This session will present a tutorial on some of these open source tools. I’ll show you how to get them, how to install them, how to run them, and how to interpret their output. The tools should work on any of the major Linux distributions, but the focus will be on the three most popular community-based distributions, Ubuntu, openSUSE and Fedora.
17th–19th June 2009