How to analyze JVM heap memory ？

Elastic Stack Elasticsearch
1

I want to know where memory used in es, as shown in the following figure：21.3gb memory used now in this node.i know some of them, such as:

  1. indices.queries.cache.size
  2. indices.fielddata.cache.size
  3. index.requests.cache.size
  4. segment memory（FTS is here？）
  5. indices.memory.index_buffer_size
  6. Indexing_pressure

we can get 1 2 3 4 from _cat/nodes API，how can i get 5 and 6 monitor？
and what else is there used memory ? search agg or some things ? how can monitor them?

image。

2

Can you elaborate more on what problem you are looking to solve here?

3

I just want to know where the memory is used and monitor it。

4

Which version are you using? Which GC are you using?

If you are using CMS GC it will only kick in once the heap is 75% full so not all 21.3GB might actually be used at the moment.

5

7.10.2 G1