# JBoss - JVM Heap size allocated 5 GB but unable to correlate find this total 5 GB in Dynatrace

**URL:** <https://community.dynatrace.com/t/jboss-jvm-heap-size-allocated-5-gb-but-unable-to-correlate-find-this-total-5-gb-in-dynatrace/19940>\
**Category:** Open Q&A\
**Tags:** jvm, java\
**Created:** [March 12, 2019, 9:09am UTC](https://community.dynatrace.com/t/jboss-jvm-heap-size-allocated-5-gb-but-unable-to-correlate-find-this-total-5-gb-in-dynatrace/19940 "2019-03-12T09:09:00Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rchavan1](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/rchavan1/32/31170_2.png) [@rchavan1](https://community.dynatrace.com/u/rchavan1)\
**Post date:** [March 12, 2019, 9:09am UTC](https://community.dynatrace.com/t/jboss-jvm-heap-size-allocated-5-gb-but-unable-to-correlate-find-this-total-5-gb-in-dynatrace/19940/1 "2019-03-12T09:09:00Z")

</div>

I have allocated 512 MB for Heap size, I want to see all these total 5 GB in Dynatrace, I assume that the sum of committed bytes for Eden Space, Survivor and old gen - is equal to total JVM - heap size ?

Please, can anyone provide these details?

Thank you

-Rajesh Chavan

---

<div class="post-metadata">

**Author:** ![rchavan1](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/rchavan1/32/31170_2.png) [@rchavan1](https://community.dynatrace.com/u/rchavan1)\
**Post date:** [March 22, 2019, 9:56am UTC](https://community.dynatrace.com/t/jboss-jvm-heap-size-allocated-5-gb-but-unable-to-correlate-find-this-total-5-gb-in-dynatrace/19940/2 "2019-03-22T09:56:02Z")

</div>

Dynatrace  
confirmed that the Heap will equal the Par Eden + Survivor + Old Gen. So if you  
add the committed memory of those three it should add up to the Heap size.

they  
did mention that versions before Java 8 include the Perm Gen.