SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

Data Set Options for Relational Databases 4 BL_DATA_BUFFER_SIZE= Data Set Option 217Default value: noneValid in: DATA and PROC steps (when accessing DBMS data using SAS/ACCESSsoftware)DBMS support: DB2 under UNIX and PC HostsSyntaxBL_CPU_PARALLELISM=number of processes or threadsSyntax Descriptionnumber of processes or threadsspecifies the number of processes or threads that the load utility uses to parse,convert, and format data records when building table objects.DetailsTo specify this option, you must first set BULKLOAD=YES.This option exploits intrapartition parallelism and significantly improves loadperformance. It is particularly useful when loading presorted data, because recordorder in the source data is preserved.The maximum number that is allowed is 30. If the value of this parameter is 0 orhas not been specified, the load utility selects an intelligent default that is based on thenumber of available CPUs on the system at run time. If there is insufficient memory tosupport the specified value, the utility adjusts the value.When BL_CPU_PARALLELISM is greater than 1, the flushing operations areasynchronous, permitting the loader to exploit the CPU. If tables include either LOB orLONG VARCHAR data, parallelism is not supported and this option is set to 1,regardless of the number of system CPUs or the value that the user specified.Although use of this parameter is not restricted to symmetric multiprocessor (SMP)hardware, you might not obtain any discernible performance benefit from using it innon-SMP environments.See AlsoFor more information about using BL_CPU_PARALLELISM=, see theCPU_PARALLELISM parameter in the IBM DB2 Universal Database Data MovementUtilities Guide and Reference.“BL_DATA_BUFFER_SIZE= Data Set Option” on page 217“BL_DISK_PARALLELISM= Data Set Option” on page 246“BULKLOAD= Data Set Option” on page 290BL_DATA_BUFFER_SIZE= Data Set OptionSpecifies the total amount of memory to allocate for the bulk load utility to use as a buffer fortransferring data.Default value:none