The 64-bit mode enables higher maximum values to be specified in some definition operands, as shown in Table 11-2.

Table 11-2 Operands with higher maximum value specifications (HiRDB system definition)

Operand	Specification item	Max value in 32-bit mode	Max value in 64-bit mode
pd_hash_table_size	Hash table size when application of hash execution for a hash join or a subquery is specified	524,288 kilobytes	2,097,152 kilobytes
pd_sql_object_cache_size	SQL object buffer size	256,000 kilobytes	2,000,000 kilobytes
pd_table_def_cache_size	Table definition information buffer size	65,535 kilobytes	2,000,000 kilobytes
pd_view_def_cache_size	View analysis information buffer size	32,000 kilobytes	2,000,000 kilobytes
pd_type_def_cache_size	User-defined type information buffer size	65,536 kilobytes	2,000,000 kilobytes
pd_routine_def_cache_size	Routine definition information buffer size	65,536 kilobytes	2,000,000 kilobytes
pd_sds_shmpool_size	Single-server shared memory size	200,000 kilobytes	4,000,000,000 kilobytes
pd_dic_shmpool_size	Dictionary server shared memory size	200,000 kilobytes	4,000,000,000 kilobytes
pd_bes_shmpool_size	Back-end server shared memory size	200,000 kilobytes	4,000,000,000 kilobytes
pd_lck_pool_size	Lock pool size per server	2,000,000 kilobytes	2,000,000,000 kilobytes
pd_fes_lck_pool_size	Lock pool size for front-end servers	2,000,000 kilobytes	2,000,000,000 kilobytes
pd_work_buff_size	Work table buffer size	1,000,000 kilobytes	4,000,000,000 kilobytes
pdbuffer	Number of global buffer definitions	500 per server*	1,000 per server*
pdbuffer -n	Number of global buffer sectors	460,000	1,073,741,824
SHMMAX	Maximum shared memory segment size	2,047 megabytes	4,194,304 megabytes

^* Total of 1600 definitions per system.