Thanks. This is good info. Does this mean that if I measure the CPU usage
of the SMF address space I will be able to approximate the CPU overhead?
>My management is asking me how much overhead is consumed by z/OS for
processing the SMF records.
Producing SMF records is the cost.
Presenting them to SMF and having the task write them out is cheap.
Because it's asynchronous.
Move SMF down in importance and you won't suffer.
The records will get written when there are cycles available.
That's why SMF has buffers.
The sub-systems have built in metrics.
If you supress the records, you haven't stopped the 'overhead' of
collecting them.
But, here's a question for you:
"What is the cost of not producing them?"
-
-teD
O-KAY! BLUE! JAYS!
Let's PLAY! BALL!
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