HISSERV service overview
The HISSERV service can be used by authorized products to retrieve hardware instrumentation event and sampling data directly from storage.
Although individual products can query the service for any subset
of event types they desire, the sampling parameters are global to
every product that intends to collect sampling data. The global sampling
parameters, or service parameters are set by the most recent MODIFY
HIS,BEGIN
or MODIFY HIS,SERVICE
command. A profiler
chooses how often to collect event type data and how much time is
spent processing sampling data, but the frequency is global for all
profiler's collecting sampling data. Any of these might cause a performance
degradation to the system and should be carefully decided.
For details, see the HISSERV service interface in z/OS MVS Programming: Authorized Assembler Services Reference EDT-IXG, and for information on the
MODIFY HIS,BEGIN
or MODIFY HIS,SERVICE
commands, see Starting, configuring, and stopping HIS data collection.