# Heap size recomandation for Read only System

**URL:** <https://community.neo4j.com/t/heap-size-recomandation-for-read-only-system/5360>\
**Category:** Neo4j Graph Platform\
**Tags:** performance, heap, memory, operations\
**Created:** [February 27, 2019, 6:31pm UTC](https://community.neo4j.com/t/heap-size-recomandation-for-read-only-system/5360 "2019-02-27T18:31:28Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rotemgabay82](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/rotemgabay82/32/2860_2.png) [@rotemgabay82](https://community.neo4j.com/u/rotemgabay82)\
**Post date:** [February 27, 2019, 6:31pm UTC](https://community.neo4j.com/t/heap-size-recomandation-for-read-only-system/5360/1 "2019-02-27T18:31:28Z")

</div>

Hi,  
I have 100GB size database .  
What is the default heap size for 61GB RAM ? (The cache size is 50% but nothing written on the heap)  
What is the recommanded value for Read-Only , few user with long queries ?  
In case I only load data once, and have few users do I need large heap ?

Thanks!

---

<div class="post-metadata">

**Author:** ![michael.hunger](https://sea1.discourse-cdn.com/flex021/user_avatar/community.neo4j.com/michael.hunger/32/27377_2.png) [@michael.hunger](https://community.neo4j.com/u/michael.hunger)\
**Post date:** [March 1, 2019, 1:13am UTC](https://community.neo4j.com/t/heap-size-recomandation-for-read-only-system/5360/2 "2019-03-01T01:13:03Z")

</div>

Depends on your type of queries.

I'd probably go with 16G heap and 38G page-cache.