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cluster-stats API provides similar output to the
is one crucial difference: Node Stats shows you statistics per node, while
cluster-stats shows you the sum total of all nodes in a single metric.
This provides some useful stats to glance at. You can see for example, that your entire cluster
is using 50% of the available heap or that filter cache is not evicting heavily. Its
main use is to provide a quick summary that is more extensive than
cluster-health, but less detailed than
node-stats. It is also useful for
clusters that are very large, which makes
node-stats output difficult
The API may be invoked as follows: