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years, removing roadblocks to deploying new or ported applications on
PostgreSQL. These include:
* Synchronous Replication: enable high-availability with consistency across
multiple servers
* Per-Column Collations: support linguistically-correct sorting per database,
table or column.
* Unlogged Tables: greatly improves performance for ephemeral data
Our community of contributors innovates with cutting-edge features. Version 9.1
includes several which are new to the database industry, such as:
* K-Nearest-Neighbor Indexing: index on "distance" for faster location and text
search queries
* Serializable Snapshot Isolation: keeps concurrent transactions consistent
without blocking, using "true serializability"
* Writeable Common Table Expressions: execute complex multi-stage data updates
in a single query
* Security-Enhanced Postgres: deploy military-grade security and Mandatory
Access Control
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