OBIEE 11g :- Clear cache (Call SAPurgeAllCache();)

Login to the OBI Analytics home (http://<IP ADDRESS>:9704/analytics/saw.dll?bieehome)  using Admin credemtials

Click on the Administration menu in the top of the right hand side.

Click on the Issue SQL link as per the given below.

In the Text area type the below command. Click the Issue SQL button.

In your RPD, you can also clear the cache of specific databases.
Call SAPurgeCacheByDatabase( ‘MYDB’ );