My name is Greg Rahn I previously worked at Cloudera on Impala, Hadoop, and Big Data challenges.

Prior to Cloudera I worked as a database performance engineer in the Real-World Performance Group at Oracle Corporation for over 8 years (2004-2012) and started working with Oracle databases in 1997.

My goal with this blog is to communicate how I have worked through some of the performance challenges that I’ve encountered as well as discuss performance and scalability topics that may benefit other members of the community.

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