The 64-bit mode enables higher maximum values to be specified in some definition operands, as shown in Table 11-3.

Table 11-3 Operands with higher maximum value specifications (client environment definition)

Operand	Specification item	Max value in 32-bit mode	Max value in 64-bit mode
PDAGGR	Number of groups resulting from grouping	30,000,000	2,147,483,647
PDHASHTBLSIZE	Hash table size when application of hash execution for a hash join or a subquery is specified	524,288 kilobytes	2,097,152 kilobytes