This presentation will take a look at the performance changes in the development version of PostgreSQL.  A selection of features, some proposed and some already committed, are evaluated using synthetic open source workloads.  One of the workloads used is the former OSDL's Database Test 3 that consists of business oriented ad-hoc queries with concurrent data modification.

Some of these proposed features include:

• New index type called Block Range Indexes (BRIN)
• Improvements to the buffer cache management
• Improvements to the data lock management
• Other internal data structure changes