A single dbspace for the IQ shared temporary store, IQ_SHARED_TEMP, is created when you create a database or upgrade a 12.7 ESD#5 or higher IQ database to Sybase IQ 15.3. This dbspace stores temporary structures that are shared among nodes for distributed query processing.
Initially, this dbspace contains no files. To add files, use ALTER DBSPACE ADD FILE. Allocating files to this dbspace is optional and required only for distributed query processing in multiplex servers.