My cloudserver always runs out of memory. I have a look and found Elasticsearch always use almost 40% of all memory. I tried to upgrade my memory but the memory usesage keeps scaling with extra memory added.
Is that a normal behavior? Is there anyway I can do about that? Like reduce the memory usage or stop Elasticsearch? I don’t have a lot of content yet to really need a search feature that is too resource consuming.
At the moment, I only want to test to see if Open Edx is suitable with my need so I can only afford a modest cloudserver.
Thank you a lot. I am very new to Open Edx and Ubuntu 
See changelog for version 19.0.0:
Release v19.0.0 · overhangio/tutor · GitHub
You may want to upgrade 
[Feature] Replace Elasticsearch by Meilisearch. Elasticsearch was both a source of complexity and high resource usage. With this change, we no longer run Elasticsearch to perform common search queries across Open edX. This includes: course discovery, courseware search and studio search. Instead, we index all these documents in a Meilisearch instance, which is much more lightweight in terms of memory consumption.
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