Statistics for PDS members

If STATS mode is on, ISPF creates and maintains statistics for partitioned data set members. These topics explain the effect STATS mode has on your statistics, first when you are beginning an edit session and then when you are saving data:

Effect of Stats mode when beginning an edit session
Effect of Stats mode when saving data

Note: Stats mode is ignored for sequential data sets.

Included in the statistics are version and modification levels. These numbers can be useful in controlling library members. See Sequence number format and modification level for a discussion of how the generation of statistics affects the format of sequence numbers.