As posted to our announcements mailing list, we’ll be upgrading both of our commodity PostgreSQL servers “pgteach” and “pgresearch” this week (Wednesday 16th Sep, for the avoidance of doubt!) to the latest major version, 9.4.
The process is usually fairly painless as it can be performed “online” with only a few minutes of downtime, and a few minutes of read-only operation.
For details of the changes in the new version, you’d be advised to read the release notes on the PostgreSQL website.
For more information on use of the servers, computing support provide PostgreSQL help.