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Optimizing Hadoop Parameters Based on the Application Resource Consumption Ziad Benslimane The interest in analyzing the growing amounts of data has encouraged the deployment of large scale parallel computing frameworks such as Hadoop. In other words, data analytic is the main reason behind the success of distributed systems; this is due to the fact that data might not fit on a single disk, and that processing can be very time consuming which makes parallel input analysis very useful. Hadoop relies on the MapReduce programming paradigm to distribute work among the machines; so a good balance of load will eventually influence the execution time of those kinds of applications. This paper introduces a technique to optimize some configuration parameters using the application's CPU utilization in order to tune Hadoop; the theories stated and proved in this paper rely on the fact that the CPUs should neither be over utilize