Understanding pagefile.sys % Usage performance monitor (perfmon) counter correctly Lately we run into performance inssues and I started tracking some recommended sql, memory, disk and cpu counters. I informed myself about the recommended values and numbers to look at.
One of the counters is :

pagefile.sys % Usage  

We had really small values like 0,5 in the beginning of collecting metrics. When it came to performance problems we reached numbers like 83,69

Does that mean 83,69% was swapped from memory to disk from the available page file? I am kind of new to this and would love to understand what's going on in order to prevent.
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