Delay Type

Reason

Request to bring modules into memory

Delays occur when a module is brought repeatedly into memory or when the search for the module on DASD takes a long time.

Factors that influence search times include concatenated libraries, large directories, or poor placement of the libraries.

Large concatenation used for program library

A program or one of its subroutines uses a large concatenation of data sets that reside on different volumes and require a significant amount of I/O to process the program management activity.