Programming Interface Information: The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM.

#### MRSTORST

Prolog
Control Block Contents
Cross Reference

#### MRSTORST Prolog

     DSECT NAME - STORST
     FUNCTION - Map a Monitor record.
     LOCATED By -
            Through the Monitor Control Area
     REFERENCED CONTROL BLOCKS -
            MRRECHDR    Monitor Record Header
     NAME - MRSTORST
     DESCRIPTIVE NAME - Monitor Event Record
                        Domain 3 - Storage Domain
                        Record 22 - Central Storage Add/Remove started
     DESCRIPTION - Generated whenever central storage is added or
                   removed from the real memory configuration
     NOTES:

#### MRSTORST Control Block Contents

    Offsets
    Dec  Hex  Type        Len  Name (Dim)             Description

       0   0  Structure    56  STORST                 Start of monitor record
       0   0  Character     0  STORST_MRHDR           Record header - see
                                                      MRRECHDR for details
       0   0  Character    20  MRHDR
       0   0  Unsigned      2  MRHDRLEN
       2   2  Unsigned      2  MRHDRZER
       4   4  Unsigned      1  MRHDRDM
       5   5  Unsigned      1  *
       6   6  Unsigned      2  MRHDRRC
       8   8  Character     8  MRHDRTOD
      16  10  Character     4  *
      20  14  Character     0  MRHDR_END
      20  14  Bitstring     1  STORST_DSRFLAG0        Flag byte identifying
                                                      charactistics of the SET
                                                      STORAGE operation.
              1... ....        *
              .1.. ....        *
              ..1. ....        *
              ...1 ....        *
              .... 1...        *
              .... .1..        STORST_DSRF0MAXF       MAXPAGEFULL operand
                                                      specified. Valid only if the
                                                      reconfig is a remove
                                                      operation.
              .... ..1.        STORST_DSRF0FORC       FORCE operand specified.
                                                      Valid only if the reconfig is
                                                      a remove operation.
              .... ...1        *
      21  15  Unsigned      1  STORST_DSRWARNPC       MAXPAGEFULL percent used
                                                      for a storage removal
                                                      operation. This value was
                                                      requested using the
                                                      MAXPAGEFULL operand on the
                                                      SET STORAGE command, or
                                                      defaulted to the
                                                      paging-warning percent
                                                      established by the PAGING
                                                      WARNING system config
                                                      statement or a previous SET
                                                      PAGING WARNING command. Valid
                                                      only if the reconfig is a
                                                      remove operation.
      22  16  Character     2  *                      Reserved for IBM use
      24  18  Character     8  STORST_DSRUSERID       Userid who issued the SET
                                                      STORAGE command to initiate
                                                      the reconfiguration.
      32  20  Unsigned      8  STORST_CALPERMADD      Amount of permanent storage
                                                      to add in bytes.
      40  28  Unsigned      8  STORST_CALRECONFADD    Amount of reconfigurable
                                                      storage to add in bytes.
      48  30  Unsigned      8  STORST_CALRECONFREM    Amount of reconfigurable
                                                      storage to remove in bytes.
      56  38  Character     0  STORST_END

#### MRSTORST Cross Reference

                          Hex           Hex
    Name                  Offset Length Value

    MRHDR                      0     20
    MRHDR_END                 14      0
    MRHDRDM                    4      1
    MRHDRLEN                   0      2
    MRHDRRC                    6      2
    MRHDRTOD                   8      8
    MRHDRZER                   2      2
    STORST                     0     56
    STORST_CALPERMADD         20      8
    STORST_CALRECONFADD       28      8
    STORST_CALRECONFREM       30      8
    STORST_DSRFLAG0           14      1
    STORST_DSRF0FORC          14           02
    STORST_DSRF0MAXF          14           04
    STORST_DSRUSERID          18      8
    STORST_DSRWARNPC          15      1
    STORST_END                38      0
    STORST_MRHDR               0      0

    This information is
    based on z/VM V7R2.0.

    Last updated on 26 February 2021 at 14:21:07.

    Copyright IBM Corporation, 1990, 2021