Oracle Parallel Server

Synonyms

Parallel Server Option

PSO

(OPS) An Oracle configuration that allows for multiple Oracle servers running on seperate computers to access the same database files simultaneously.

Normally used for high availability, running parallel servers can improve performance by spreading out CPU load, however, it requires data to be partitioned correctly.

This feature is enabled with the Parallel Server Option (or "PSO").

Oracle Parallel Server Option FAQ.