Paging space requirements
DB2 requires paging, also called swap to be enabled. This configuration is required to support various functions in DB2 which monitor or depend on knowledge of swap/paging space utilization. The actual amount of swap/paging space required varies across systems and is not solely based on memory utilization by application software. It is only strictly required by DB2 on the Solaris and HP platforms due to their use of early paging space allocation.