Technology Insights

PostgreSQL: Server Instrumentation Not Installed. The Server Lacks Instrumentation Functions.

When connecting to a PostgreSQL database using pgAdmin you may receive an error letting you know that the server instrumentation is not installed. This is a warning to let you know that you can install the adminpack contribution which will provide more functionality to pgAdmin including the ability to modify the pg_hba.conf and postgresql.conf configuration files. Below is information on the pop up warning you may receive when logging into a Postgres database using pgAdmin III as well as how to install the adminpack to not receive the error any longer.

Technology Insights

Upgrade PostgreSQL 8.3 To PostgreSQL 8.4 On A CentOS Server Using Yum

I have been needing to upgrade the PostgreSQL servers at my work for awhile now and was finally forced to do so after needing some of the features available with PostgreSQL 8.4.X. Currently we are running PostgreSQL 8.3.10 which is super old but it is definitely not the latest stable release available. One thing I am looking forward to testing is the improvements to the vacuum process. Over the past two years I have become a lot more familiar with Postgres and one thing that has been disappointing is the downtime involved in reclaiming disk space via data removed from PSQL database tables. The full vacuum process, which is required to reclaim disk after deleting data from a table, in 8.3 requires a lock on tables which essentially causes downtime. When you are dealing with large tables over 10GB in size this can take days to complete. Follow the directions below to first backup all of your PostgreSQL data, remove the current PostgreSQL installation, and then install PostgreSQL 8.4 on a CentOS Linux server.