Niall, monitoring will show table as used, but statistics is updated at the time of commit. First, there is no statistics in USER_TABLES that would count the number of times that blocks have been referenced by I/O and second, statistics for monitored tables is not updated until the transaction commits. To do otherwise would seriously break the relational rules. Sadly, V$SESSION_LONGOPS is inaccurate, cryptic and, generally speaking, useless. In everything else you and Juan are right. Have a nice day. -- Mladen Gogala Ext. 121 -- //www.freelists.org/webpage/oracle-l