Here is where you can find support for UsageDD
. From its description:
UsageDD allows administrators to monitor the resource usage of their WordPress installation. It will add a line at the bottom of each page, only visible to administrators, that displays the number of MySQL queries, the amount of memory used by the page’s code, and if your server supports it, the “time to first byte” (TTFB) and the time required to generate the full page.
You can use the display to determine if your site has too many plugins loaded, if your theme is too “heavy”, or if something is wrong on your server. The plugin itself uses virtually no resources and should be compatible with every theme and plugin.
If you are using PHP 5.4+ and a compatible webserver (most are compatible), UsageDD will display the TTFB and the CPU time required to output the entire page. TTFB is used by Google for page-ranking purposes, and it will be the first of the two times displayed.