This book constitutes the refereed proceedings of the 4th TPC Technology Conference, TPCTC 2012, held in Istanbul, Turkey, in August 2012.
It contains 10 selected peer-reviewed papers, 2 invited talks, a report from the TPC Public Relations Committee, and a report from the workshop on Big Data Benchmarking, WBDB 2012. The papers present novel ideas and methodologies in performance evaluation, measurement, and characterization.

TPC Benchmark Roadmap 2012.- Incorporating Recovery from Failures into a Data Integration Benchmark.- Two Firsts for the TPC: A Benchmark to Characterize Databases Virtualized in the Cloud, and a Publicly-Available, Complete End-to-End Reference Kit.- Adding a Temporal Dimension to the TPC-H Benchmark.- Performance Per Watt - Benchmarking Ways to Get More for Less.- Revisiting ETL Benchmarking: The Case for Hybrid Flows.- MulTe: A Multi-Tenancy Database Benchmark Framework.- BDMS Performance Evaluation: Practices, Pitfalls, and Possibilities.- Data Historians in the Data Management Landscape.- Scalable Generation of Synthetic GPS Traces with Real-Life Data Characteristics.- S3G2: A Scalable Structure-Correlated Social Graph Generator.- Benchmarking in the Cloud: What It Should, Can, and Cannot Be.- Characterizing Cloud Performance with TPC Benchmarks.- Setting the Direction for Big Data Benchmark Standards.