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VAX, SPTREQ and NOSLOT errors?

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The Question is:

What is the cause of a NOSLOT error when a  SHOW SYSTEM only reflects 61
 processes yet maxproccesscnt is 110???
This started after I raised the SPTE's on this VAX and besides being unable to
 create new processes, other processes that are still alive hang.
I could really benefit from a prompt answer on this.

The Answer is :

  The OpenVMS Wizard will assume you have used AUTOGEN and MODPARAMS.DAT
  to make the specified change to the system parameters.
  The OpenVMS Wizard expects you have probably encoutered the limit on
  the total size of VAX system space.
  The process data structures, the VAX process page tables, as well as
  paged and non-paged pool and the operating system code must all fit
  into the available VAX system space.  VAX systems with large virtual
  address space, with large pool, with large numbers of processes, or
  often with a combination of these can exhaust the available VAX address
  You could try to increase the number of balance set slots (BALSETCNT)
  available, reduce the virtual page limits (VIRTUALPAGECNT), reduce the
  number of processes, or enable and use the virtual balance set slots
  (VBSS*) mechanism.
  Other considerations include reducing the loaded code and drivers, and
  reducing the number of reserved page table entries.  Also review the
  system hardware configuration for the availability of free physical
  OpenVMS Alpha moves various large data structures into 64-bit space,
  and moves the page tables into page table space.

answer written or last revised on ( 2-FEB-2001 )

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