From Query Plan to Performance: Supercharging your Apache Spark Queries using the Spark UI SQL Tab

The SQL tab in the Spark UI provides a lot of information for analysing your spark queries, ranging from the query plan, to all associated statistics. However, many new Spark practitioners get overwhelmed by the information presented, and have trouble using it to their benefit. In this talk we want to give a gentle introduction to how to read this SQL tab. We will first go over all the common spark operations, such as scans, projects, filter, aggregations and joins; and how they relate to the Spark code written. In the second part of the talk we will show how to read the associated statistics to pinpoint performance bottlenecks.

After attending this session you will have a better grasp on query plans and the SQL tab, and will be able to use this knowledge to increase the performance of your spark queries.

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