Understanding pagefile.sys % Usage performance monitor (perfmon) counter correctly
pagefile.sys % Usage shows total system committed not what currently is utilized. This value can increase due to load when system finds out it has to back process with more page file.
Have a look at below link for detailed explanation

http://blogs.technet.com/b/perfguru/archive/2008/01/08/explanation-of-pagefile-usage-as-reported-in-the-task-manager.aspx

I would like to know what problem you are facing