Elasticsearch 7.9, set or not manually JVM heap memory

[parallelism]

Hello,

We are deploying an Elasticsearch 7.9.3 cluster in a production environment. About setting or not the Java heap memory assignment, we find in the documentation something that seems a little contradictory.

According to this, is "important to configure heap size" because "by default, Elasticsearch tells the JVM to use a heap with a minimum and maximum size of 1 GB".

Setting the heap size | Elasticsearch Guide [7.9] | Elastic

However, this another entry explain that Elasticsearch "automatically sets the JVM heap size based on a node’s roles and total memory", recommending "the default sizing for most production environments".

Important Elasticsearch configuration | Elasticsearch Guide [7.x] | Elastic

When deploying the cluster with not heap memory parameters, we see the Elasticsearch process with the options "MaxHeapSize" and "MinHeapSize" with a value of 1GB.
Therefore, ¿we should explicitly configure the heap size parameters for a higher value?
Otherwise, ¿the heap will have always the 1GB size?

Thanks in advance.

Reggards.

[dadoonet (David Pilato)]

@parallelism

However, this another entry explain that Elasticsearch " automatically sets the JVM heap size based on a node’s roles and total memory ", recommending " the default sizing for most production environments ".

This has been introduced from 7.11.