pg_statsinfo is a utility that monitor statistics and the activity of PostgreSQL(and OS). pg_statsinfo gets some statistics information as snapshot. We can check the DB activity and bottleneck analysis by using these snapshot information. This utility provides some function to get the information acquisition easily.
The pg_statsinfo project is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pgstatsinfo, where you can find downloads ,documentation, bug reports, mailing lists, and a whole lot more.
There are two versions in pg_statsinfo, v1 and v2. They are developed for the same purpose, but there are difference in usage and no compatibilities.
pg_reporter is a graphical report tool for PostgreSQL. It has templates for pg_statsinfo 2.0, but you also add another template to make a report for PostgreSQL databases. You can easily write a new template with HTML and SQL.