What version of Oracle? Neither view seems to exist in my 10g database but I did find this in the 11g Reference manual >> V$CLASS_CACHE_TRANSFER is deprecated. The information that was provided in this view is now provided in the V$INSTANCE_CACHE_TRANSFER and V$SEGMENT_STATISTICS views. << The definition of v$calltag is most question marks in my downloaded version. Maybe the online docs have been updated. You might try checking there. -- Mark D Powell -- Phone (313) 592-5148 ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Amit Verma Sent: Friday, May 23, 2008 7:37 AM To: oracle_l Subject: Any Info V$CALLTAG or V$CLIENT_CACHE_TRANSFER Any Info on V$CALLTAG or V$CLIENT_CACHE_TRANSFER ?