Atsushi Mitani from SRA Nishi-Nihon Inc. presented on how to perform write load balancing in PostgreSQL using transactions. He explained that write load distribution is important for systems with high write volumes. PostgreSQL can distribute write load using table partitioning with foreign data wrappers (FDW), which allows partitioning across database instances. Mitani created patches to automate the partitioning setup and load data in parallel to child tables to speed up benchmarking. Benchmark results showed that while increasing child databases improves performance without transactions, increasing parent databases is better with transactions to avoid lock queues. The optimal configuration depends on data size, queries, and hardware.