PHPWiki Troubleshooting
From DreamHost
Application vulnerabilities are the #1 reason why websites experience high loads. Visit the PHPWiki website and be sure you are running the latest version.
There is also a discussion on the PHPWiki website on how to enhance performance.
If PHPWiki is still using a lot of resources, it could be that your wiki has become very popular. While our shared hosting servers are very good at handling quite a bit of traffic from our customers, there does come a point sometimes where a site will outgrow shared hosting and need to move onto the next step - a shiny new Dedicated server!

