i have a question regarding saving Heap Space for the ES Nodes. As far as i know there is a shard Limit per Node due to heap usage / management.
And there seems also a kind of "calculation" Formula ( for each node stays below 20 per GB of heap) which definetely is not correct but could help to get an Idea.
I facing now the problem...that the es-cluster gets dynamically new indexes which mostly are only used from time to time. This means the amount of "active" shards grows more and more. I know i could increase the cluster with new nodes.
But my question is would it also help if i close indicies? https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-close.html
Will the memory then be lower and is actually a good practice todo so?
Next question which Parameters are responsible for the duration of reopening the index? Size only?
Thanks for any help