NPAGEVIR defines the maximum size to which NPAGEDYN can be increased. If this value is too small, the system can hang. If NPAGEVIR is too large, the result is a penalty of 8 bytes per extra page. For the benefit of OpenVMS systems with limited physical memory, AUTOGEN logs a warning message in its report if NPAGEDYN or NPAGEVIR exceeds certain percentages of physical memory. AUTOGEN limits its own calculated values for NPAGEDYN and NPAGEVIR. These calculated values are adequate for most systems. If your system requires a larger value, you can override the AUTOGEN calculated values by setting higher values for MIN_NPAGEDYN and MIN_NPAGEVIR in MODPARAMS.DAT. NPAGEVIR has AUTOGEN and GEN attributes.