The Adabas Caching Facility is used to define caching parameter settings and also to monitor caching operations. For detailed information, see the Caching Facility section in the Adabas for Mainframes documentation.
When the Adabas Caching Facility is installed on your system, the Adabas Manager provides easy access to the optional caching facilities.
Note:
If the Adabas Caching Facility is not
installed on your system, the icon will not be displayed in your
Adabas Manager tree-view.
To view the files with caching for a database:
Select an Adabas database in tree-view and expand it.
Select Caching Facility in tree-view.
In detail-view, a table displays file names and numbers of the files with caching as well as their cache type and status.
To change the status of a file, select the file by checking the appropriate box in the table and click on , or .
To define a file cache:
Select Caching Facility in the tree-view and right-click on it.
Select on the drop-down menu.
In detail-view, the Define File Cache table is displayed and allows you to define one or more files to be cached.
Note:
Files already cached are displayed in a second table together
with their cache type and status.
The following specifications can be set in the table:
Cache Type
Files may be cached in ASSO, ASSO
and DATA, and DATA space.
Memory Type
The memory type can be Extended,
Hiperspace, Dataspace, or
Virtual 64. The choices available depend on the operating
system configuration under which Adabas is running.
Virtual 64 is only available for systems running z/OS version 1.2 or above on
the appropriate hardware.
File Number From... To
Specifying the start file number and the end file number defines a
file range to be cached in the defined cache space. If only one file is to be
cached, it is not necessary to specify an ending file number.
Class of Service
Allows you to define the percentage of the file you want to be
cached (100%, 75%, 50%, 25%, or 10%).
Enter your specifications in the table and click or .
The files you have successfully cached are displayed in a second table together with their cache type and status, i.e, added to the table where cached files already existed.
To maintain cache parameters:
Select Caching Facility in the tree-view and right-click on it.
Select on the drop-down menu.
In detail-view, the Maintain Cache Parameters table displays the current setting of the Adabas Caching (ADARUN) parameter values and allows you to change them.
The following specifications can be set in the table:
Display Cache Space Statistics - Yes or No
Minimum Buffer Efficiency
Elapsed Time (GETMAIN)
Time of Inactivity
Maximum Number Permitted
Maximum ASSO Cache Size
Maximum DATA Cache Size
WORK Memory Type
Percent WORK2 RABNs
Percent WORK3 RABNs
Read Ahead Caching
Number of Buffers
Command Types Excluded
Note:
Values for Max. ASSO Cache Size and Max. DATA Cache Size
represent bytes, but may be marked with a K (1 kilobyte=1024 bytes), M (1
megabyte=1,048,576 bytes), or G (1 gigabyte=1,073,741,824 bytes) indicator when
the size of the value requires it.
For more information about these parameters, see Adabas Caching Parameters in the Caching Facility section in the Adabas for Mainframes documentation.
Enter your specifications in the table and click or .
To view the cache session summary:
Select Caching Facility in the tree-view and right-click on it.
Select on the drop-down menu.
In detail-view, the Cache Session Summary table displays a summary of information for the Adabas Caching session including cache statistics, read-ahead statistics, and allocation statistics for active and inactive cache spaces.
