How to rightsize AWS Opensearch instance size

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I am looking at our 6 Opensearch instances and am trying to work out if they are the correct instance size or can be downsized.

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CPU usage is quite low, but memory appears to be high. However, I know with RDS the "freeable memory" is basically irrelevant and always displays around 15% if the memory usage isn't high.

Is there a best practise for rightsizing opensearch?

asked 9 months ago90 views
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