> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of John S. Giltner, Jr. > Sent: Monday, April 24, 2006 10:08 PM > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: Overhead of SMF Records > > > 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. >
The only "big overhead" that I am aware of, and have experienced, is with the DDCONS(YES) parameter. Always use DDCONS(NO)! I think that DDCONS(YES) has something in it about efficient as a bubble sort of 100,000 records. Yuck! -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- 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
