Solving performance problems with Memcache Mutex extension for eZ Publish - Part II: Technical details
Here is just a short technical explanation of the topic in the last blog post. That post described how we solved a performance issue on one eZ Publish based web site by developing an eZ Publish extension which overrides eZMutex to use memcache instead of file locking. The extension is published and shared with the community on projects.ez.no.
The post is describing how we solved a performance issue on one eZ Publish based web site. The site was using more web servers with shared disk device based on SAN. With no obvious reason web servers had high load averages and what was even worse: increasing load on one web server would quickly increase load on other web servers...