CMT DISPLAY AUTOTUNE Command

The DCMT DISPLAY AUTOTUNE command shows statistics related to automatic tuning.
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The DCMT DISPLAY AUTOTUNE command shows statistics related to automatic tuning.
This article describes the following information:
2
Syntax
The following diagram shows the syntax for the DCMT DISPLAY AUTOTUNE command:
►►─ DCMT ─┬───────────────────┬───────────────────────────────────────► └─ broadcast-parms ─┘ ►── Display AUTotune ─┬────────────┬─────────────────────────────────►◄ ├─ * ────────┤ ├─ DPE ──────┤ ├─ RCE ──────┤ ├─ RLE ──────┤ └─ SYSlocks ─┘
Parameters
This section describes the parameters for the DCMT DISPLAY AUTOTUNE command:
  • broadcast-parms
    Executes the DCMT command on all or a list of data sharing group members. For more information about the broadcasting and broadcast-parms syntax, see "How to Broadcast System Tasks" in the "System Tasks and Operator Commands" section.
  • *
    Displays graphs and summary information for all parameters for which automatic tuning is enabled.
  • DPE
    Displays the graph and summary information for the DPE count parameter.
  • RCE
    Displays the graph and summary information for the RCE count parameter.
  • RLE
    Displays the graph and summary information for the RLE count parameter.
  • SYSlocks
    Displays the graph and summary information for the SYSLOCKS parameter.
If no parameter type is specified, summary information for all parameters is displayed.
Example
The following command displays summary information about all parameters being automatically tuned:
DCMT D AUTOTUNE *** Display Autotune *** AUTOTUNE last save time (time zone: UTC): 2009-12-21-15.10.12.528239 Parameter|Lowest |Highest |SYSGEN |Current | Next Name | HWM | HWM | Value | Value |Value ------------+-----------+-----------+-----------+-----------+----------- SYSLOCKS | 140 | 160 | 600 | 600 | 454 ------------+-----------+-----------+-----------+-----------+----------- RLE | 334 | 353 | 5000 | 5000 | 3841 ------------+-----------+-----------+-----------+-----------+----------- RCE | 303 | 312 | 5000 | 5000 | 3833 ------------+-----------+-----------+-----------+-----------+----------- DPE | 497 | 517 | 600 | 600 | 588 ------------+-----------+-----------+-----------+-----------+-----------
  • Last save time
    Indicates the date and time that tuning information was last saved. The value is in the UTC timezone.
  • Parameter Name
    Indicates the name of the parameter being tuned.
  • Lowest HWM
    Indicates the lowest high-water mark recorded in the last 32 collection intervals.
  • Highest HWM
    Indicates the highest high-water mark recorded in the last 32 collection intervals.
  • Current HWM
    Indicates the high-water mark for the current time interval.
  • SYSGEN Value
    Indicates the value assigned to the parameter in the system definition when the DC/UCF system was last started.
  • Current Value
    Indicates the value assigned to the parameter when the system was last started. This value will be assigned to the parameter when the system is next started if it terminated abnormally.
  • Next Value
    Indicates the value that will be assigned to the parameter when the system is next started if it terminated normally.
The following command displays automatic tuning information for only the SYSLOCKS parameter.
DCMT D AUTOTUNE SYSLOCKS *** Display Autotune *** AUTOTUNE last save time (time zone: UTC): 2009-12-21-15.06.12.460692 Parameter name: SYSLOCKS 160| _ _ _ |_ # # _ _ _ _ _ _ _ _ # _ _ _ _ _ _ _ _ _ _ _ |# # # # # # # # # # # # # # # # # # # # # # # _ _ _ _ _ _ _ _ _ |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # |# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # 0L#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_#_ Summary ------- Original SYSGEN value: 600 Highest HWM: 160 Current value: 600 Lowest HWM: 120 Next value: 454 Current HWM: 120
In addition to the fields shown in a summary display, a detail display includes the following information.
  • Graph
    Shows the high-water mark recorded for the parameter in each of the last 32 time intervals.
    The horizontal axis represents time intervals, in oldest to newest order.
    The vertical axis represents HWM values. The scale adjusts to accommodate the range of HWM values being displayed.