LOOK System Task

The LOOK task allows you to look at miscellaneous system information.
idmscu19
The LOOK task allows you to look at miscellaneous system information.
This article describes the following information:
Syntax
►►─── LOOK ────────────────────────────────────────────────────────────────────►  ►─┬─ AM= access-module-name ──────────────────────────────────┬─────────┬─┬───►◄    │                                                           └ fib-opt ┘ │    │                                                                       │    ├─ AM PROGRAM= access-module-name ──────────────────────────────────────┤    │                                                                       │    ├─ BIND SQL SEGMENT=segment-name,DBNAME=database-name ──────┬─────────┬─┤    │                                                           └ fib-opt ┘ │    │                                                                       │    ├─ BIND SUBSCHEMA= subschema-name ┬──────────────────────┬──┬─────────┬─┤    │                                 └ DBNAME=database-name ┘  └ fib-opt ┘ │    │                                                                       │    ├─ DATES= load-module-name ─────────────────────────────────────────────┤    │                                                                       │    ├─ DATETIME ────────────────────────────────────────────────────────────┤    │                                                                       │    ├─ DATETIME STAMP= hex-internal-datetime-stamp ─────────────────────────┤    │                                                                       │    ├─ DBTABLE ─────────────────────────────────────────────────────────────┤    │                                                                       │    ├─ DMCL ─┬───────┬──┬────────────────┬──────────────────────┬─────────┬─┤    │        └─ ALL ─┘  ├─ SORTED ───────┤                      └─ RADIX ─┘ │    │                   └─ SORTED PAGES ─┘                                  │    │                                                                       │    ├─ EXTERNAL DATETIME=external-datetime-value ───────────────────────────┤    │                                                                       │    ├─ FIND=hex-string ─────────────────────────────────────────────────────┤    │                                                                       │    ├─ HELP ────────────────────────────────────────────────────────────────┤    │                                                                       │    ├─ OPTION FLAGS ────────────────────────────────────────────────────────┤    │                                                                       │    ├─ PROGRAM= load-module-name ───────────────────────────────────────────┤    │                                                                       │    ├─ PROGRAM POOL ────────────────────────────────────────────────────────┤    │                                                                       │    ├─ RCM PROGRAM= RCM-module-name ────────────────────────────────────────┤    │                                                                       │    ├─ STORAGE POOL ────────────────────────────────────────────────────────┤    │                                                                       │    └─ SUBSCHEMA= subschema-name ───────────────────────────────┬─────────┬─┘                                                                └ fib-opt ┘
Expansion of fib-opt
   ┌────────────────────────────────────────────────────────────────────┐ ►►─▼──┬──────────────┬──────────────────────────────────────────────────┴─────►◄       ├─ ALL ────────┤       ├─ RADIX ──────┤       ├─ NOFILES ────┤       └─ BOUNDFILES ─┘
Parameters
  • AM=
    access-module-name
    Specifies that some commands display additional information about the DMCL or subschema entities reported. Currently supported by DMCL and FIB-related reports.
  • AM PROGRAM=
    Displays a core dump of an ACCESS module.
  • BIND SQL SEGMENT=
    Displays the logical and physical attributes for areas, tables, constraints, and indexes for a segment of an SQL-defined database. The output is similar to that of the BIND SUBSCHEMA function.
    • segment-name
      The name of the segment that contains the SQL database areas.
    • DBNAME=
      database-name
      The name of the database that contains the segment where the catalog for the SQL definitions reside.
  • BIND SUBSCHEMA=
    Displays the logical and physical attributes of the subschema.
    • subschema-name
      The name of a subschema load module.
    • DBNAME=
      Required unless you are binding to an originally built release 10.x subschema that is being converted to Release 12.0 format.
    • database-name
      The name of a database.
  • BOUNDFILES
    Displays only files connected to bound areas when a FIB is bound. Additional DMCL information is not displayed.
  • DATES=
    Displays the DATE/TIME stamps of the components of a specified load module.
    • load-module-name
      The name of a load module.
  • DATETIME
    Displays the current Date/Time.
  • DATETIME STAMP=
    Displays the external value of an internal Date/Time stamp.
    • hex-internal-datetime-stamp
      The 16 hexadecimal digits that make up the internal representation of the Date/Time stamp.
  • DBTABLE
    Displays the contents of the DBNAME table that is used when doing a BIND SUBSCHEMA.
  • DMCL
    Reports the contents of the current DMCL module.
    • ALL
      Optionally, produces the following information in addition to the standard information provided on the DMCL report:
      • The date each area definition was last updated
      • A history of the last date and time that an area was affected by a DCMT VARY DMCL command
    • SORTED
      Sorts DMCL information by area name.
    • SORTED PAGES
      Sorts DMCL information by page range.
  • EXTERNAL DATETIME=
    external-datetime-value
    The 26 characters that make up the external representation of the date/time stamp. The format is
    yyyy
    -
    mm
    -
    dd
    -
    hh
    .
    mm
    .
    ss
    .
    ffffff
    .
    • yyyy
      specifies the year.
      yyyy
      must be an integer in the range 0001 through 9999.
    • mm
      specifies the month within the year.
      mm
      must be an integer in the range 01 through 12.
    • dd
      specifies the day within the month.
      dd
      must be an integer in the range 01 through 31.
    • hh
      specifies the hour on a 24-hour clock.
      hh
      must be an integer in the range 00 through 23.
    • mm
      specifies the number of minutes past the hour.
      mm
      must be an integer in the range 00 through 59.
    • ss
      specifies the number of seconds past the minute.
      ss
      must be an integer in the range 00 through 59.
    • ffffff
      specifies the number of millionths of a second past the specified second.
  • FIND=
    hex-string
    Displays the program name and offset into the program where the address was found. Hex-string is the 8 hexadecimal digits of the address to be searched for. The address must reside in one of the programs that reside in the PROGRAM POOL.
  • HELP
    Displays the parameters supported by the LOOK task.
  • NOFILES
    Displays no file information or additional DMCL-related information when a FIB is bound.
  • OPTION FLAGS
    Displays all the numbered options that have been activated by setting flags in the current RHDCOPTF module. This parameter replaces OPTIONAL APARS.
  • PROGRAM=
    Displays the DATE/TIME stamp of all the components that make up the load module. A core dump of the load module is also provided.
    • load-module-name
      The name of the load module.
  • PROGRAM POOL
    Displays the contents of the PROGRAM POOL. Shows the program name, entry point address, load address, use count, and size of the program.
  • RADIX
    Displays the number of bits reserved for a dbkey line number in hex when an FIB is bound.
  • RCM PROGRAM=
    Displays a core dump of an RCM MODULE.
  • STORAGE POOL
    Displays the contents of the STORAGE POOL. Shows the storage address, storage size, task number that acquired the storage, owner of the storage, and storage type.
  • SUBSCHEMA=
    Displays the logical attributes of the subschema.
    • subschema-name
      The name of a subschema.
Example
LOOK DMCL
      DMCL ALL SORTED IDMSLOOK  -  OPSYS=z/OS         Release nn.n Service pack n   tape volser DMCL ALL SORTED                DMCL=S74DMCL               Runtime Size---> 12CFC  (77,052 Bytes)     This DMCL uses dbtable R120DBTB    Compiled Size---> 0BC5C  (48,220 Bytes) Date Last Critical Change=2007-05-16  12.03.24    The Operating System is z/OS Date Created=2007-05-16  12.03.23      Date Last Updated=2007-05-16  12.03.24     Dynamic File Allocation - on     Data Sharing is active - on connectivity no abend     Data Sharing Lock Entries - 4,096     Data Sharing Members - 4     Data Sharing Default Shared Cache - IDMSCACHE00002     Memory Cache Location ANYWHERE Storage Limit OPSYS     CV Change tracking is active                                 Page      Low         High      Page      Area Name            Shr Group     Page        Page      Size    DDNAME ----------------------    --- -----  ----------  ----------  ------  --------   DBCR.ACCTHIST                    15     690,001     740,040   2,932  ACCOUNTA                                                                      ACCOUNTB                                                                      ACCOUNTC                                                                      ACCOUNTD                                                                      ACCOUNTE   NETWORK area   On STARTUP go Update                    On WARMSTART use current status   Definition date last critical change=2007-05-16  12.03.23   Page Reserve size      0      Space Management Page Interval       1,450   Max Records Per Page                                                 255   Page Range Symbolic is ACCTHIST           Value is      690,001--->740,040 DBCR.BRNCHTEL                    15     680,001     685,012   4,000  BRANCHA                                                                      BRANCHB                                                                      BRANCHC                                                                      BRANCHD   NETWORK area   On STARTUP go Update                    On WARMSTART use current status   Definition date last critical change=2007-05-16  12.03.23   Page Reserve size      0      Space Management Page Interval       1,984   Max Records Per Page                                                 255   Page Range Symbolic is BRNCHTEL           Value is      680,001--->685,012 EMPDEMO.EMP-DEMO-REGION           0      75,001      75,100   4,276  EMPDEMO  .  .  .                                           Mem.- Shared    File Name                 DDNAME  Type Cache Cache   Buffer Name --------------------------- -------- ---- ----- ----- ------------------   DBCR.ACCOUNTA               ACCOUNTA BDAM   No   Yes  DBCR_ACCT_BUFFER       DSname: (DMCL)   DBDC.SYSTEMXX.DBCRACCA.X                        Cache Name=IDMSCACHE00002       Definition date last critical change=2007-05-16  12.03.23 DBCR.ACCOUNTB               ACCOUNTB BDAM   No   Yes  DBCR_ACCT_BUFFER       DSname: (DMCL)   DBDC.SYSTEMXX.DBCRACCB.X                        Cache Name=IDMSCACHE00002       Definition date last critical change=2007-05-16  12.03.23 DBCR.ACCOUNTC               ACCOUNTC BDAM   No   Yes  DBCR_ACCT_BUFFER       DSname: (DMCL)   DBDC.SYSTEMXX.DBCRACCC.X                        Cache Name=IDMSCACHE00002       Definition date last critical change=2007-05-16  12.03.23  .  .  .               *** CV Change Tracking SYSTRK files ***   File    Mirror   Page    Block     Data Set Name   Name    Status   Size    Count         (DSN) --------   ---    ------  -------  -------------------------------------------- SYSTRK1    Yes     4,096       60  DBDC.SYSTEM74.SYSTRK1 SYSTRK2    Yes     4,096       60  DBDC.SYSTEM74.SYSTRK2 SYSTRK3    Yes     4,096       60  DBDC.SYSTEM74.SYSTRK3 SYSTRK4    Yes     4,096       60  DBDC.SYSTEM74.SYSTRK4 SYSTRK5    No      4,096       60  DBDC.SYSTEM74.SYSTRK5 SYSTRK6    No      4,096       60  DBDC.SYSTEM74.SYSTRK6 SYSTRK7    No      4,096       60  DBDC.SYSTEM74.SYSTRK7 SYSTRK8    No      4,096       60  DBDC.SYSTEM74.SYSTRK8 SYSTRK9    No      4,096       60  DBDC.SYSTEM74.SYSTRK9               DMCL Journals         Page Size      # of Pages             -------------         ----------     ----------               SYSJRNL1                   2,932         30,000               DSname: (JCL)    DBDC.SYSTEM74.SYSJRNL1               Definition date last critical change=2007-05-16  12.03.23             SYSJRNL2                   2,932         30,000               DSname: (JCL)    DBDC.SYSTEM74.SYSJRNL2               Definition date last critical change=2007-05-16  12.03.23             SYSJRNL                   19,068        Archive               Journal Buffers      Buffer Size   # of Buffers             ---------------      -----------   ------------               JNL_BUFFER                 2,932             80               Definition date last critical change=2007-05-16  12.03.23                        Buffer    CV      CV   Total CV     Local  Local DMCL Buffers          Size   Buffers  Type    Size      Buffers  Type ------------         ------   ------   --   ----------   ------   --   DBCR_BRCH_BUFFER      4,000    5,000   OS   20,000,000        3   DC DBCR_ACCT_BUFFER      2,932    5,000   OS   14,660,000        3   DC LOG_BUFFER            1,076        5   OS        5,380        3   DC SCRATCH_BUFFER        2,676        5   OS       13,380        3   DC DEFAULT_BUFFER        9,076       30   OS      272,280        3   DC                     0 Bytes used for CV buffers in DC storage          34,951,040 Bytes used for CV buffers in OS storage          34,951,040 Bytes used for CV DMCL Buffers                59,280 Bytes used for LOCAL buffers in DC storage                   0 Bytes used for LOCAL buffers in OS storage              59,280 Bytes used for LOCAL DMCL Buffers         Dbtable=R120DBTB             Compiled Date=2007-05-16  17.18.23                  The DEFAULT Dictionary is TSTDICT   DBNAME is *DEFAULT  match on subschema is OPTIONAL     Subschema IDMSNWK? maps to IDMSNWK? using DBNAME ---> TSTDICT     Subschema EMPSS??? maps to EMPSS??? using DBNAME ---> EMPDEM2     Subschema EV?????? maps to EV?????? using DBNAME ---> VSAMTDB     Subschema ET?????? maps to ETSTSUBS using DBNAME ---> ETOTDB     Subschema DBCR???? maps to DBCR???? using DBNAME ---> DBCR  .  .  . DBGROUP is DBGROUP1 DISABLED
LOOK DATETIME
     DATETIME IDMSLOOK  -  Selection Parameter Follows: DATETIME          DATETIME ───► 2003-08-26-18.25.25.955510          CLOCK TIME ─► 18:25:25.95