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The Question is: How do I change the default vaule for "login" from 64 to 500? The Answer is : Add the following line in SYSTARTUP_VMS.COM: $ STARTUP$INTERACTIVE_LOGINS == 500 To change the value on a running OpenVMS system, use the command: $ SET LOGIN/INTERACTIVE=500 Add the following line in MODPARAMS.DAT: MIN_IJOBLIM = 500 You will also need to examine the BALSETCNT and MAXPROCESSCNT system parameter values to ensure sufficient process slots are available for the additional logins now permitted. Add the following lines into MODPARAMS.DAT if alterations are required: MIN_BALSETCNT = nnn MIN_MAXPROCESSCNT = nnn + mmm Adjusting the RJOBLIM setting (MIN_ROBLIM in MODPARAMS.DAT) may also be of interest, as this value controls the total number of network logins permitted. With all OpenVMS VAX versions and OpenVMS Alpha versions prior to V7.0, you may need to decrease the VIRTUALPAGECNT setting to permit the (larger) page table data structures that will result from an increase in the maximum number of process -- these data structures must fit into the available system space. With the 64-bit addressing changes available in OpenVMS Alpha V7.0 and later (the page tables have been moved out of their traditional location in system space and into the newly created and dedicated page table space), having large numbers of processes -- each with large a virtual address space -- is far easier to configure. Then run AUTOGEN with FEEDBACK and SETPARAMS or REBOOT to generate and save the new system parameter settings, and then reboot the system to activate the saved parameter settings. Of course, you will also need to consider other system parameter settings and other issues related to available hardware resources as a result of increasing the numbers of processes, issues such as the available physical memory configured in the system. The performance management manual in the OpenVMS documentation set will be of interest.
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