Customizing File Dimensions

The high performance scheduling techniques in M3 SWB require that certain types of data be kept in memory. For this reason, M3 SWB files are set to maximum file dimension at delivery.

You can see the maximum file dimension and the actual number of positions that are used by a particular file by selecting Systems > Planning Dimensions in the standard menu. You can also see detailed information for each file by selecting File Dimensions and opening a file. (Refer to the Section General Hardware Requirements for more detail.)

The Windows operating system can store large data structures within the 32-bit address space even when the physical memory at the Windows work station is smaller than the memory required. Windows does this by paging data segments between the physical memory and the SWAP file on the hard disk. This paging process is lengthy and extends the SWAP file. Therefore it is best that enough physical memory be provided to prevent Windows from paging (a minimum of 300 MB, 400 MB is recommended). If this is not possible, you can reduce the requirement for physical memory by adjusting the File Dimensions defined in the PMSTYF99.DAT file in accordance with those you estimate are required by your company.