Cobe, You do have me a little confused when you talk about capping at 24 MSUs and setting the WEIGHT (which I assume is the LPAR weighting factor) to 160. These are different. Also, the LPAR weighting factor is just a relative number. It does not relate to MIPS.
As far as the LPAR going over the cap in any given interval, that can occur as long as the MSU four hour rolling average (4HRA) remains below the cap. It is when the 4HRA hits the cap that you'll see the peaks chopped off. Once the 4HRA falls below the cap the system can once again spike up above that. If you have a cap set, and you are on sub-capacity pricing, IBM's software charges for the sub-capacity priced software will be based on the highest 4HRA for the month, but will never exceed the cap. Actually, if you are not using sub-capacity pricing for your software, I can't think of any reason to set a cap. Tom Kelman Capacity Planning Commerce Bank, Kansas City -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Cobe Xu Sent: Wednesday, November 03, 2010 5:00 AM To: [email protected] Subject: CPU capping is not working for one Lpar only on CEC? Hi list, We aim to cap the only active LPAR on the CEC(26 MSU) to 24 MSU. But, I'm a bit confuse when I checked the RMF CPU Activity report as below, which shows that with the interval, SYS2 was able to use up to 25 MSU. (Highlighted) So my questions are: 1. Is this because CPU capping is not working for only one active LPAR on the CEC? If it's the case, any reference? 2. Or, this is related to the WEIGHT value we used to CAP? in our case, we reference our CEC capacity is 26 MSU (about 171 MIPS), target to CAP 24 MSU (160 MIPS). . But, for client's sake, we use MIPS value as the WEIGHT,i.e 160. (as highlighted in the report). And, this mislead the Lpar scheduler that it is over 100% of the CEC. Thus, SYS2 can use as much as it needs. 3. Or any other posibility? Pls shed some light, thanks a lot! PAGE 2 z/OS V1R8 SYSTEM ID SYS2 START 08/17/2010-03.00.00 INTERVAL 000.59.59 RPT VERSION V1R8 RMF END 08/17/2010-04.00.00 CYCLE 0.100 SECONDS MVS PARTITION NAME SYS2 NUMBER OF PHYSICAL PROCESSORS 4 GROUP NAME N/A IMAGE CAPACITY 24 CP 2 LIMIT N/A NUMBER OF CONFIGURED PARTITIONS 5 ICF 2 WAIT COMPLETION NO DISPATCH INTERVAL DYNAMIC --------- PARTITION DATA ----------------- -- LOGICAL PARTITION PROCESSOR DATA -- -- AVERAGE PROCESSOR UTILIZATION PERCENTAGES -- ----MSU---- -CAPPING-- PROCESSOR- ----DISPATCH TIME DATA---- LOGICAL PROCESSORS --- PHYSICAL PROCESSORS --- NAME S WGT DEF ACT DEF WLM% NUM TYPE EFFECTIVE TOTAL EFFECTIVE TOTAL LPAR MGMT EFFECTIVE TOTAL SYS2 A 160 0 25 YES 0.0 2 CP 01.55.49.238 01.55.53.278 96.52 96.57 0.06 96.52 96.57 SYS6 A 10 0 0 YES 0.0 2 CP 00.00.00.000 00.00.00.000 0.00 0.00 0.00 0.00 0.00 *PHYSICAL* 00.00.01.367 0.02 0.02 ------------ ------------ ------ ------ ------ TOTAL 01.55.49.238 01.55.54.645 0.08 96.52 96.59 CFP01AH2 A DED 1 ICF 00.59.59.655 00.59.59.725 99.99 99.99 0.00 50.00 50.00 CFP02AH2 A DED 1 ICF 00.59.59.666 00.59.59.708 99.99 99.99 0.00 50.00 50.00 *PHYSICAL* 00.00.00.422 0.01 0.01 ------------ ------------ ------ ------ ------ TOTAL 01.59.59.321 01.59.59.855 0.01 99.99 100.0 SYS8 -- Cobe Xu Best Regards ----------------------------------------------------------- zOS Performance & Capacity Analyst E2E Performance Analyst Email: [email protected] ----------------------------------------------------------- ---------------------------------------------------------------------- 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 ***************************************************************************** If you wish to communicate securely with Commerce Bank and its affiliates, you must log into your account under Online Services at http://www.commercebank.com or use the Commerce Bank Secure Email Message Center at https://securemail.commercebank.com NOTICE: This electronic mail message and any attached files are confidential. The information is exclusively for the use of the individual or entity intended as the recipient. If you are not the intended recipient, any use, copying, printing, reviewing, retention, disclosure, distribution or forwarding of the message or any attached file is not authorized and is strictly prohibited. If you have received this electronic mail message in error, please advise the sender by reply electronic mail immediately and permanently delete the original transmission, any attachments and any copies of this message from your computer system. ***************************************************************************** ---------------------------------------------------------------------- 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
