Hi Joe, Interesting development in Omegamon. I am still new to Omegamon, but I am going to install V4.2 next month, how do I check if I have Interim Feature 1, how do I install it?
Kees. "Joseph H Winterton" <jose...@us.ibm.com> wrote in message news:<of614ad680.d9513ffb-on86257685.0060f861-85257685.00614...@us.ibm.c om>... > Well we in OMEGAMON have been working on the cpu looping issue lately: > > Detecting an address space in an infinite loop is not an easy job. Our > modern z/OS LPARs often have multiple CPUs and specialty processors like > zIIP and zAAP where instructions can be dispatched. In addition Workload > Manager will try to distribute processor resources equitably based on the > current workload mix and priorities defined in the installation?s policy. > Lower priority batch workloads that happen to be looping can easily run > under the radar for long periods of time squandering resources. > > OMEGAMON XE on z/OS 4.2.0 with the addition of Interim feature 1 has a > strategy to help surface these problems. OMEGAMON has had a feature > called Bottleneck Analysis for many years. Bottleneck Analysis builds a > profile over time through periodic sampling of what execution states are > being used by address spaces. These execution states include things like > Using CPU, Using zIIP, Using zAAP, Waiting for CPU, Waiting for zIIP, > Waiting for zAAP, Using I/O, Waiting for I/O, Waiting for Enqueue, Waiting > for HSM, Swapped, etc. A cpu looping address space will reveal itself by > populating only the using and waiting states for CPU resources (including > zIIP and zAAP). > > OMEGAMON XE on z/OS 4.2.0 has a new attribute called CPU Loop Index that > uses this bottleneck information as its basis. High priority workloads > can be reliably detected fairly quickly. The real trick is discriminating > between well behaved low priority work that is just starved for attention > from low priority work that is looping. OMEGAMON XE on z/OS 4.2.0 Interim > Feature 1 provides this discrimination by dynamically extending the > observation period required before indicating a likely loop when the ratio > of waiting for CPU to Using CPU is high. For more information on OMEGAMON > XE on z/OS approach to CPU Loop detection please see the article titled > ?Detecting CPU looping address spaces using IBM Tivoli OMEGAMON XE on z/OS > version 4.2.0? in the August issue of the z System Advisor at > http://www-01.ibm.com/software/tivoli/systemz-advisor/2009-08/. > > Joe Winterton > Release Mgr - OMEGAMON - Development Team > 919-224-1328 Cell -914-954-0483 - jose...@us.ibm.com > > > > From: > Hal Merritt <hmerr...@jackhenry.com> > To: > IBM-MAIN@bama.ua.edu > Date: > 12/07/2009 09:48 AM > Subject: > Re: Detect the loop for batch job > Sent by: > IBM Mainframe Discussion List <IBM-MAIN@bama.ua.edu> > > > > All programs 'loop'. It is what they do. > > About the only automated solution I can think of would be to set a CPU > time limit. > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On > Behalf Of Joel C. Ewing > Sent: Saturday, December 05, 2009 11:20 AM > To: IBM-MAIN@bama.ua.edu > Subject: Re: Detect the loop for batch job > > On 12/04/2009 10:14 AM, bjbxd wrote: > > Hello List, > > We are looking for a tool to detect the loop for batch application, > > any suggestion are appreciated. > > > > My shop is runing z/OS, application is C/C++. > > Bob. > > > NOTICE: This electronic mail message and any files transmitted with it are > intended > exclusively for the individual or entity to which it is addressed. The > message, > together with any attachment, may contain confidential and/or privileged > information. > Any unauthorized review, use, printing, saving, copying, disclosure or > distribution > is strictly prohibited. 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