Total transaction time (in seconds). Note: Certain i5/OS™ functions
support the concept of a transaction. The definition of a transaction and
the characteristics of a transaction are different depending on the type of
job or the specific function of the job. For interactive jobs, display I/O
transactions are counted. The transaction starts on detection of enter from
the workstation; the transaction ends when the keyboard is unlocked. For SNADS
jobs, a transaction is the processing of a distribution.