Problems with PostgreSQL on Multi-core Systems with Multi-Terabyte Data - Jignesh K. Shah's PostgreSQL Blog
http://people.planetpostgresql.org/jkshah/index.php?/archives/3-Problems-with-PostgreSQL-on-Multi-core-Systems-with-Multi-Terabyte-Data.html PostgreSQL: benchmarks and further analisys for OLTP workloads 8-32 cores with ~TB db size from Sun’s potgresql team