# Fwd: FW: Java heap memory is low but process memory isstill high

**URL:** <https://discuss.elastic.co/t/fwd-fw-java-heap-memory-is-low-but-process-memory-isstill-high/22395>\
**Category:** Elasticsearch\
**Created:** [February 25, 2015, 11:08pm UTC](https://discuss.elastic.co/t/fwd-fw-java-heap-memory-is-low-but-process-memory-isstill-high/22395 "2015-02-25T23:08:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![liu\_wei](https://avatars.discourse-cdn.com/v4/letter/l/cab0a1/32.png) [@liu\_wei](https://discuss.elastic.co/u/liu_wei)\
**Post date:** [February 25, 2015, 11:08pm UTC](https://discuss.elastic.co/t/fwd-fw-java-heap-memory-is-low-but-process-memory-isstill-high/22395/1 "2015-02-25T23:08:29Z")

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Hi everyone,

Just wondering if anyone has encountered similar things before I dig more  
into Java memory management. So we found machines are constantly in high  
memory usage although the “reported” memory usage from ElasticSearch is  
low. A couple of points:

1. 

```
  Java Heap Memory(top left chart) drops under 2G, which I guess is

```

mainly because of GC on old pool (bottom right chart)

1. 

```
  FieldData usage is low (top right)

```

2. 

```
  OS memory never drops (bottom left chart). When I login to the

```

machines, the Java process is still taking 12~13GB memory.

Anyone had similar problems before?

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 12:30am UTC](https://discuss.elastic.co/t/fwd-fw-java-heap-memory-is-low-but-process-memory-isstill-high/22395/2 "2017-07-06T00:30:03Z")

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Closed on July 6, 2017, 12:30am UTC