This document contains official content from the BMC Software Knowledge Base. It is automatically updated when the knowledge article is modified.
How to extend the amount of data that is retained in the CMF MONITOR HISTDSxx datasets. How do I calculate the size for additional HISTDSxx datasets
The information in FIGURE 1 below is found within the “MainView common documentation 6.2.00” manual under topic “To allocate and format the historical data sets”. This topic includes complete details discussing considerations for allocating HISTORY data sets. The @@YZZ051 member is found in both the MainView for z/OS SMP/E Target BBILIB and BMCILIB suffixed data sets cataloged during the Installation processes can be used to define the HISTORY data sets. This member discusses considerations when defining HISTORY data sets; and includes the recommendation in FIGURE 2 when considering the allocation of the HISTORY data set. Please review this information and contact us if we can provide any assistance.
FIGURE 1: Determine the size of the historical data sets.
After you complete customizing all products, allow the PAS to run for approximately 24 hours. During the 24-hour period, note when the PAS receives messages indicating that the historical data set is full and is being switched. By using this method, you can determine how much space is typically required to hold historical data over a given amount of time. You can then adjust the size of the historical data sets according to whether you want them to hold data for a longer or shorter period of time.
//* - CHANGE ?CYL0 TO THE NUMBER OF CYLINDERS TO BE ALLOCATED FOR
//* THE PRIMARY HISTORICAL DATA SET.
//* - CHANGE ?BLK0 TO THE NUMBER OF CYLINDERS REQUESTED (?CYL0)
//* PLUS 20%. THAT IS, IF YOU REQUESTED 100 CYLINDERS, SET
//* THIS VALUE TO 120.