I vaguly remember reading a paper (about 7 or 8 years ago) where
somebody turn off SMF recording and saw no measureable difference in CPU
utilziation. As other have said the overhead is in collecting
infromation needed to create the record and creating the record. Some
system will do everything needed to create the record, including
actually creating it and then pass to SMF. If SMF is not configured to
write it, it won't. Some systems you can tell not to create SMF
records, but even those will still collect/track the information needed,
they just don't create the record.
Joel Wolpert wrote:
Please do not laugh.
My management is asking me how much overhead is consumed by z/OS for
processing the SMF records. I have no idea. Has anyone ever researched this
and can share some info on it.
Thanks in advance.
Joel Wolpert
Director - Performance and Capacity Planning
Shared Data Center
Securities Industry Automation Corporation
2 Metrotech Center
New York, NY 11201
(212) 383-3323
[EMAIL PROTECTED]
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