In a message dated 4/24/2006 4:01:48 P.M. Central Daylight Time, [EMAIL PROTECTED] writes:
>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. The eternal correct answer to all known questions: it depends. MVS internally creates all the record types even if you don't want them written. Some record types are much more complex than others, and the creation of complex records uses more overhead than that of simple record types. Then just before the already-created record is written, the test is made to see if you want record type X written. If yes, then there is the overhead of writing that record type multiplied by the frequency of occurrence of record type X. If you don't want X types written, then no additional overhead. The frequency of occurrence of any given record type also depends on innumerable variables; e.g., one record type might be written by a TSO session every time it performs operation Y. How many TSO sessions do you have at the same time? How often do they perform operation Y? You asked for the overhead in "processing" the records. MVS does not pr ocess the records. MVS creates and then optionally writes them. Your application program processes the records after they are written. So the total overhead of writing them must be increased by whatever overhead your program that reads them in and processes them imposes. You may be able to offload the post-processing overhead to another system or even platform. Bill Fairchild ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
