#!F-adobe-helvetica-medium-r-normal--18* #!N #!N #!Rtall735 DXSHMEM #!N specifies whether or not shared memory should be used. The amount of memory allocated by Data Explorer for its data and object management can be set at runtime with the -memory command line option. At startup, Data Explorer either allocates a shared memory segment or expands the existing data segment to create this space. #!N #!N SMP (multiprocessor) systems are required to use shared memory so each processor can share a common data space. SGI systems also use shared memory for space. IBM systems use shared memory if the size to be allocated is larger than 256 MB. In all other cases Data Explorer extends the existing data segment using the brk() system call. #!N #!N Each architecture (SGI, IBM, HP, ...) has a different way of configuring the maximum user data segment size, and a different way of setting the limit on the maximum size of a single shared memory segment. Consult your system administrator or system documentation if you have problems getting Data Explorer to use the amount of memory which should be available to you. #!N #!N If you have problems using a large data segment, you can force Data Explorer to use shared memory by setting the DXSHMEM environment variable to any value other than -1. This will override the defaults and use shared memory for space. Alternatively, you can force Data Explorer to extend the data segment (if allowed for the architecture) by setting DXSHMEM to -1. Note: Regardless of the setting of DXSHMEM, the aviion and sun4 architectures always use the data segment. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Ltall737,dxall737 h DXSHMEMSEGMAX #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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