Try the script libcache_lock.sql at www.appsdba.com/scripts_db.htm. This script is based on Oracle Note: 122793.1. Andy Rivenes arivenes@xxxxxxxx At 08:32 AM 5/12/2005, Sami Seerangan wrote: >Drop index is waiting for the library cache lock as per the the trace >file below. >How to map the p1 and p2 parameters to identify who is blocking this object= >? -- //www.freelists.org/webpage/oracle-l