pg_activity is a top like application for PostgreSQL server activity
Command line tool for PostgreSQL server activity monitoring. pg_activity is a PostgreSQL monitoring tool that provides real-time insights into database performance, helping database administrators manage and troubleshoot PostgreSQL instances.
Glances is an open source, cross-platform monitoring tool that aims to provide a significant amount of monitoring information through a curses or Web-based interface. Depending on the size of the user interface, this information can then dynamically adapt.
Glances can work in client/server mode, and is also capable of remote monitoring. All systems statistics can be exported to files or external time/value databases.
Glances gets information from your system through various libraries,...
QOS is a monitoring system. It can monitor Cpu, Disk, Memory, etc. on a large number of
hosts (300+). It can also monitor web sites, DNS, and other network services, and can generate reports from the collected monitor data.