List tables by their size in Db2 database

Query below returns tables in a database with space they use ordered from the ones using most.


select tabschema || '.' || tabname as table,
      decimal((data_object_p_size + index_object_p_size +
            long_object_p_size + lob_object_p_size +
            xml_object_p_size)/1024,10,2) as physical_space,
       decimal((data_object_l_size + index_object_l_size +
            long_object_l_size + lob_object_l_size +
            xml_object_l_size)/1024,10,2) as logical_space
from sysibmadm.admintabinfo
where tabschema not like 'SYS%'
order by physical_space desc


  • table - table name with schema name
  • physical_space - disk space physically allocated for the table in MB
  • logical_space - disk space logically allocated for table in MB. The logical size is the amount of space that the table knows about.


  • One row represents one table in a database
  • Scope of rows: all tables in a database
  • Ordered by table physical size, from largest to smallest

Sample results

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