DCMT DISPLAY AREA displays the following information for each area:
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Field |
Value |
|---|---|
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Area |
Area name |
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Lock |
Area status:
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Lo-Page |
Low page number. |
|
Hi-Page |
High page number. |
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#Ret |
Number of retrieval transactions actively using the area. |
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#Upd |
Number of update transactions actively using the area. |
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#Tret |
Number of transient retrieval transactions actively using the area. |
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#Ntfy |
Number of notify locks currently being held . |
|
Stamp |
The date and time the definition of the area was last changed. |
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Pg grp |
The page group. |
|
Stat |
File status: zero or an error status code. If not zero, then a DBIO error status has been signalled. |
|
Pnd |
Ready status to which an area will be varied (displayed while the area is waiting to be quiesced). |
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Share/Noshare |
Shows the sharability state of the area. |
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ICVI/NoICVI |
Shows if there is inter-CV-interest in the area. |
|
Perm/NoPerm |
Shows if the area status was established with the PERMANENT option. |
Note: If the area is the target of an outstanding VARY operation, the status to which it is being varied is also shown.
More Information
The DCMT DISPLAY AUTOTUNE command shows statistics related to automatic tuning.
The following diagram shows the syntax for the DCMT DISPLAY AUTOTUNE command:
►►─ DCMT ─┬───────────────────┬───────────────────────────────────────►
└─ broadcast-parms ─┘
►── Display AUTotune ─┬────────────┬─────────────────────────────────►◄
├─ * ────────┤
├─ DPE ──────┤
├─ RCE ──────┤
├─ RLE ──────┤
└─ SYSlocks ─┘
This section describes the parameters for the DCMT DISPLAY AUTOTUNE command:
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 Guide.
Displays graphs and summary information for all parameters for which automatic tuning is enabled.
Displays the graph and summary information for the DPE count parameter.
Displays the graph and summary information for the RCE count parameter.
Displays the graph and summary information for the RLE count parameter.
Displays the graph and summary information for the SYSLOCKS parameter.
Note: If no parameter type is specified, summary information for all parameters is displayed.
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 ------------+-----------+-----------+-----------+-----------+-----------
Indicates the date and time that tuning information was last saved. The value is in the UTC timezone.
Indicates the name of the parameter being tuned.
Indicates the lowest high-water mark recorded in the last 32 collection intervals.
Indicates the highest high-water mark recorded in the last 32 collection intervals.
Indicates the high-water mark for the current time interval.
Indicates the value assigned to the parameter in the system definition when the DC/UCF system was last started.
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.
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.
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.
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