5. FILES › 5.3 VAX/VMS Monitor Information Area Files › 5.3.6 VMS System Profile File (DEMSPR)

5.3.6 VMS System Profile File (DEMSPR)

The VMS System Profile file maintains consolidated
information on many aspects of system operation.  It is
derived from the VMS MONITOR class records for system class,
including type 1, 3, 4, 5, 6, 7, 8, 11, 14, 17, 19, 21, and
22 records.

This file contains information on:

 o  Overall system operation, including CPU busy, read I/Os,
    direct I/Os, buffered I/Os, free page count, modified
    page count, and number of active processes.

 o  Cluster-wide VMS lock activity, including enqueues,
    dequeues, and conversions.

 o  DECnet activity, including arriving and departing
    packets, lost packets, and buffer failures.

 o  Distributed Lock Management Facility, including enqueues,
    dequeues, and conversions.

 o  VMS file system ancillary control processes (ACPs),
    including new files, page faults, and read and write
    I/Os.

 o  VMS File System Cache, including cache attempts and hits
    for directories, file headers, file IDs, and extents.

 o  VMS I/O subsystem, including direct I/Os, buffered I/Os,
    page reads, page writes, and page faults.

 o  Lock management in VMS, including enqueues, dequeues, and
    deadlocks.

 o  MSCP server activities, including reads, writes,
    requests, and I/Os of various sizes.

 o  VMS Page Management System, including page faults, reads,
    read I/Os, writes, write I/Os, faults, and free pages.

 o  VMS space allocation in the nonpaged dynamic pool,
    including packets free and in use (small, intermediate,
    and large), kilobytes free and in use, and largest and
    smallest blocks available.

 o  Number of processes in each scheduler state:  waiting,
    hibernating, suspended, inswapped, and outswapped.

 o  Transaction processing statistics for DECdtm services,
    including transaction starts, commits, aborts, and ends.

The following sections describe the file's organization, and
list the data elements maintained.

   1 - DEMSPR File Organization
   2 - DEMSPR Data Elements List
   3 - DEMSPR Usage Considerations
   4 - DEMSPR Retrieval Examples