Frank, In your example you would have 100% cpu utilization for the interval. Jacky is trying to understand why he has less than 100% cpu utilization but still sees cpu contention.
________________________________ From: Frank Krueger [mailto:[EMAIL PROTECTED] Sent: Sat 1/6/2007 9:38 AM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: CPU Contention Hi think the other way - if the cpu is 50% busy - and there is one Job coming into the system and wants to work - in 50% of the time he can work - no contention. But in the other 50% of the time he cannot - cause it is busy - so there is contention . And yes i know - more complicated with more processors - but just an easy try for an explanation Frank Samstag, 6. Januar 2007 15:29 To: IBM-MAIN@BAMA.UA.EDU cc: From: "O'Brien, David W. (NIH/CIT) [C]" <[EMAIL PROTECTED]> Subject: Re: CPU Contention The CPU usage being reported is the average for a time interval of 15 or 30 minutes, whatever you have defined. At any time during that interval you had more address spaces ready to run than you had CP to accommodate hence the CPU contention. Good luck trying to explain that to management. Source : RMF Report Earlier CPU Contention was around 99%.(when CPU Usage was 100%). Post CPU Upgradation CPU Contention reduced to around 20%. However CPU Usage is still hardlt 50% tht time ... what allfactors contribute for CPU Contention ? Ideally speaking if CPU Usage is not 100% then there should not be CPU Contention. JAcky ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
