Each performance data section is made up of a string of
field connectors, followed by one or more performance data records.
All of the performance records produced by a single CICS® run
have the same format. The default length of the performance records
is given in Performance class data. The
length of the performance records changes if you add user data at
user event monitoring points (EMPs), or if you exclude any system-defined
data from the monitoring process.