Hi: I did gather statistcs for dictinary segments and fixed objects however still I see values in dba_tab_modificaions as below. As per definition, only stale objects should be displayed in dba_tab_modifications. Please correct me if I am wrong? SQL> exec dbms_stats.gather_dictionary_stats; PL/SQL procedure successfully completed. SQL> exec DBMS_STATS.GATHER_FIXED_OBJECTS_STATS; PL/SQL procedure successfully completed. SQL> select table_owner,table_name,inserts,updates,deletes from dba_tab_modifica tions order by inserts desc; TABLE_OWNER TABLE_NAME INSERTS UPDATES DELETES ------------- ---------------- --------- ---------- ---------- SYS WRH$_LATCH 8352 0 0 SYS WRH$_SYSSTAT 7584 0 0 SYS WRH$_PARAMETER 6192 0 0 SYS WRH$_SQLBIND 5426 0 0 [truncated the output for display purpose]