dear all, I have followed metalink suggestion as of Note:68836.1, but when truncate bigtable reuse storage, I got problem with SMON that hold fet$ dictionary table. the the server was restarted twice, but it seems to be same, even now i could not issue any DDL syntaxes. Now if I issue DDL syntax oracle still inform me that SMON still locking the fet$ table. please help me up.... -- regards ujang -- //www.freelists.org/webpage/oracle-l