2. PERFORMANCE REPORTING ANALYSIS › 2.7 Graphic Analysis › 2.7.3 TSO Service Graphs

2.7.3 TSO Service Graphs

MVS measures the response time it provides to TSO as well as
other workloads.  Ordinarily, you would request that MVS
manage TSO in a series of performance periods.  Generally the
size of these periods is based upon the MVS service units
consumed.  Any given transaction will slip from first period
into second after it has consumed a certain number of MVS
service units.  This continues until the transaction has
landed in the last period for the performance group or
service class to which it is assigned.

This is a heuristic algorithm--it allows MVS to repeatedly
analyze a transaction and learn whether it must continue to
treat the transaction as a short, low resource transaction or
whether it can begin assigning it priorities for resource
usage that your installation has selected for longer running,
more resource intensive transactions.

The TSO response graphs allow you to report on both first
period TSO response and overall response for the complex of
all performance periods.

This section discusses the following graphic analyses:

    1 - TSO First Period Response
    2 - TSO Complex Response