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These tools provide basic graphing, but are primarily for collecting the metrics over a long period; another tool would be used to display and monitor that information, for example Grafana https://grafana.com/. A basic dashboard for Grafana that uses Prometheus is available for import to Grafana from here.
Short Term Monitoring
JAMon does short term monitoring but not monitoring of your system over the long term. The monitoring is described as short term because once the Weave services are restarted, the metrics will be lost as they are cleared after a restart.
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