﻿---
title: High RSS memory usage due to MADV settings
description: In versions of Heartbeat prior to 7.10.2, the go runtime defaults to MADV_FREE by default. In some cases, this can lead to high RSS memory usage while...
url: https://www.elastic.co/elastic/docs-builder/docs/2350/reference/beats/heartbeat/madvdontneed-rss
---

# High RSS memory usage due to MADV settings
In versions of Heartbeat prior to 7.10.2, the go runtime defaults to `MADV_FREE` by default. In some cases, this can lead to high RSS memory usage while the kernel waits to reclaim any pages assigned to Heartbeat. On versions prior to 7.10.2, set the `GODEBUG="madvdontneed=1"` environment variable if you run into RSS usage issues.