Hi,
Your point about whether it is worth defining the second class for 2%
of the traffic applies to all sysplexes, not just monoplex. As is the case
for many of our health checks, they are designed to incorporate
principles/experiences gained over the years. Installations with at least
the two classes generally have fewer problems. But some installations may
need more classes, some less. The check simply looks at the transport
classes that are defined to see if the required number of effective sizes
have been set up. The check has a parameter to allow the installation to
indicate how many sizes should be configured. The IBM default is two per
the aforementioned history. The check does not monitor the system to
determine whether the specified number of class sizes is appropriate for
the installation. The choice of an appropriate number still requires human
judgment.
As with any check, the installation must look at the exceptions that
are raised, understand the ramifications for their particular installation,
and make a determination as to what action should be taken: fix the
problem, adjust the check inputs so it raises exceptions per what you
believe to be best practice for your own installation, or disable the check
if you deem it inappropriate for your installation.
Mark A. Brooks
z/OS Sysplex design and development
845-435-5149 T/L 8-295-5149
Poughkeepsie, NY
[email protected]
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