# How to limit off-heap memory usage
**URL:** https://discuss.elastic.co/t/how-to-limit-off-heap-memory-usage/189288
**Category:** Elasticsearch
**Created:** [July 8, 2019, 5:52am UTC](https://discuss.elastic.co/t/how-to-limit-off-heap-memory-usage/189288 "2019-07-08T05:52:18Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@cherriod](https://discuss.elastic.co/u/cherriod)
#### Post date: [July 8, 2019, 5:52am UTC](https://discuss.elastic.co/t/how-to-limit-off-heap-memory-usage/189288/1 "2019-07-08T05:52:18Z")
Hi!
I use ES 1.7 on Win2012R2 with store type mmapfs by default. It this case ES loads index in RAM and fills all of it. With a high load on the record index, after some time the product falls. I tried advice from [this](https://discuss.elastic.co/t/possibility-to-limit-memory-usage-of-mmap-fs/24908) question, but it did't help me. Please help me, how can I set memory limitation for off-heap JVM in Windows?
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 5, 2019, 5:52am UTC](https://discuss.elastic.co/t/how-to-limit-off-heap-memory-usage/189288/2 "2019-08-05T05:52:23Z")
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