I think that we are going to need a little more information to help with this issue:
-What version of ArcGIS Desktop is being used for the compress?
-What version is the enterprise geodatabase at?
-What RDBMS is the enterprise geodatabase housed in?
-What is the start and ending count from the SDE_Compress table?
-Is there anyone editing the data during the compress?
-What has changed in the last 2 days? Large data loading, more editors, etc.....