Any administrator who is responsible for one or more MySQL servers has probably run across the indispensable [mytop][], but a similar tool for PostgreSQL is less well known. However, Cosimo Streppone has ported and converted [mytop][] to [pgtop][], a Perl package to provide the same functionality – monitoring of threads, performance, reads and writes per second – for PostgreSQL.
[mytop]: http://jeremy.zawodny.com/mysql/mytop/[pgtop]: http://search.cpan.org/dist/pgtop/