# Post-upgrade issues: 6.4.2 ES heap running away (6.5.0 too) **URL:** \ **Category:** Elasticsearch\ **Created:** [October 4, 2018, 6:41pm UTC](https://discuss.elastic.co/t/post-upgrade-issues-6-4-2-es-heap-running-away-6-5-0-too/151096 "2018-10-04T18:41:04Z")\ **Posts on this page:** 3\ **Page:** 3
**Author:** ![hollowimage](https://avatars.discourse-cdn.com/v4/letter/h/ee7513/32.png) [@hollowimage](https://discuss.elastic.co/u/hollowimage)\ **Post date:** [December 12, 2018, 7:34pm UTC](https://discuss.elastic.co/t/post-upgrade-issues-6-4-2-es-heap-running-away-6-5-0-too/151096/41 "2018-12-12T19:34:21Z")
It seems the issue is now resolved. Cluster has been stable for about 18 hours, and heap is no longer running away. Ill keep an eye on it for a few days/weeks and will follow up one more time with findings, once i release a lot of my super aggressive curator policies and the data volume on the cluster incrases. ---
**Author:** ![rugenl](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rugenl/32/12887_2.png) [@rugenl](https://discuss.elastic.co/u/rugenl)\ **Post date:** [December 13, 2018, 2:11am UTC](https://discuss.elastic.co/t/post-upgrade-issues-6-4-2-es-heap-running-away-6-5-0-too/151096/42 "2018-12-13T02:11:59Z")
I'm curious, how much data to you have on disk? I saw 28G above, so 14G per node? Thanks ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 10, 2019, 2:12am UTC](https://discuss.elastic.co/t/post-upgrade-issues-6-4-2-es-heap-running-away-6-5-0-too/151096/43 "2019-01-10T02:12:06Z")
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