Presenting Performance Co-Pilot (PCP) and SystemTap, as applied to performance/health monitoring across a network. PCP is a lightweight general-purpose API and toolset for collecting, disseminating, and analyzing rigorously sampled statistics and trace/event records. We will compare it to single-purpose tools like zabbix and to higher-level frameworks like openlmi. We will describe recent developments in systemtap, and possible connections between the two tools.