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David HM Spector wrote about Ganglia’s ability to monitor system performance in a The Right Tool for the Job? blog post.
Ganglia cluster one-month uptimes
The main Ganglia page showing load averages, and when each node was last rebooted.
Ganglia can easily display collections of monitored servers.
Ganglia host overview
This Ganglia page shows overview data for a single host.
Ganglia tracks a variety of metrics for each host it monitors.
Ganglia overview pages
Ganglia overview pages show all nodes in a collection or cluster.