Space is allocated to a cluster, not to tables within the cluster. If you query on cluster_name, sum(bytes) where segment_type='CLUSTER', you'll see how much space is allocated to each cluster. To see what tables are in a given cluster, query on table_name from dba_tables where cluster_name = 'your cluster'. Does that help? -Mark -- Mark J. Bobak Senior Oracle Architect ProQuest Information & Learning There is nothing so useless as doing efficiently that which shouldn't be done at all. -Peter F. Drucker, 1909-2005 -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of genegurevich@xxxxxxxxxxxxxxxxxxxxx Sent: Friday, December 08, 2006 11:46 AM To: oracle-l@xxxxxxxxxxxxx Subject: How can I get information about space within a cluster Hi everyone: I have never dealt with oracle clusters. We have one app that utilizes them and I was asked to calculate the space of the tables within a cluster (the DB is oracle 10.2) - used and allocated. I have looked through the dba_ tables , but couldn't find any data there. Does anyone know how to accomplish this task? thank you Gene Gurevich -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l