Performance Improvements for OMEGAMON XE 420 for IMS IF3
ReggieHubbard 060000P2W2 Visits (6756)
'Dear Rocky' answers your System z monitoring and performance tuning questions.
Rocky McMahan, a Senior Software Performance Engineer in Tivoli R&D, offers valuable tips to help you get more out of your Tivoli monitoring software.
I am a Systems Programmer for a large financial institution which operates over 500 banking centers
across several provinces. We have assets of more than $30 billion and have over 7500 employees.
We use IBM® Tivoli® OMEGAMON® XE for IMS® to monitor our 4-way IMSPlex production environment running in a Parallel Sysplex with z/OS 1.12. We have found the Application Trace Facility (ATF) feature, in IBM® Tivoli® OMEGAMON® XE for IMS®, to be heavily used and exceedingly beneficial to our Operations and Systems personnel. As a result of the popularity of IBM® Tivoli® OMEGAMON® XE for IMS® in our shop, we receive hourly requests to run ATF Traces.
We would like the ability to capture Trace data when there are reported problems of high CPU utilization in certain Dependant regions. Does the IBM® Tivoli® OMEGAMON® XE for IMS® product support this capability? -Awaiting in Amsterdam
The IBM® Tivoli® OMEGAMON® XE for IMS® product does support this capability. Your company should install IBM® Tivoli® OMEGAMON® XE for IMS® Interim Feature 3 (IF3). This interim feature allows for collection of trace data in a more granular manner than previous releases. Specifically, you can now use an Exception level trace to trace only those applications, for example, that exceed an elapsed time or CPU time value greater than a threshold. There are also Application Trace Facility (ATF) functional enhancements and performance improvements which your Operations and Systems personnel will find advantageous.
Some of the ATF enhancements include;
For further information regarding the IF3 enhancements, please refer to the following link
Performance improvements to reduce CPU usage of Classic, the IMS Dependant Regions, and the IMS Control Region's Address Space Identifiers (asids), has also been incorporated into IBM® Tivoli® OMEGAMON® XE for IMS® IF3. Here are examples of the performance reductions, for CPU%, available in IF3.
The above CPU% reductions were observed during benchmarks whose throughput averaged 1000 trx/sec, 2000 trx/sec, 3000 trx/sec, 4000 trx/sec, and 5000 trx/sec. Additionally, ATF and a Trace were started using the following KI2ATFxx parameters in RKANPARU;
Many thanks to Reggie Hubbard and Robyn Stillwell for their contributions to this article.