Data center with high CPU consumption
Itestra was commissioned by a leading IT service provider in the financial sector, which managed over 100 million accounts for banks and savings banks, to analyze and optimize the CPU consumption of the central service component in the data center.
Over 20 million service calls per hour were processed via the associated interface of the z/OS application, which led to a capacity requirement of 6,000 MIPS (million instructions per second) in the so-called data pool and caused correspondingly high operating costs.
Algorithmic analysis and refactoring
At the beginning of the project, the existing implementation of the data pool was analyzed with the help of consumption profiles. As part of a manual review of the source code, algorithms and data structures were localized that significantly influenced the runtime behaviour of the data pool. Within a few days, alternative calculation strategies were designed, implemented and tested for the identified consumption hot spots.
CPU consumption
The result: CPU consumption halved
The optimized implementation went live as planned on the target release date. Renewed measurements with the profiling tool “Strobe” demonstrated an enormous saving of 55%-64% in CPU consumption in the optimized modules. Due to the very high call frequency, this corresponded to a saving of up to 3,000 MIPS, and thus a reduction in operating costs of several million euros per year. The return on investment of this targeted measure reached the break-even point after less than 6 months.
”The performance of itestra GmbH convinced us. The problem was analyzed in a short time and an optimization was implemented that led to considerable savings. itestra GmbH is a valuable partner for our plans to further reduce resource consumption.
ProjektleiterKunde
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