# Elasticsearch - getting GC and the node reconnect from the cluster **URL:** \ **Category:** Elasticsearch\ **Created:** [April 3, 2023, 4:05pm UTC](https://discuss.elastic.co/t/elasticsearch-getting-gc-and-the-node-reconnect-from-the-cluster/329232 "2023-04-03T16:05:43Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![navaneethan](https://avatars.discourse-cdn.com/v4/letter/n/f17d59/32.png) [@navaneethan](https://discuss.elastic.co/u/navaneethan)\ **Post date:** [April 3, 2023, 4:05pm UTC](https://discuss.elastic.co/t/elasticsearch-getting-gc-and-the-node-reconnect-from-the-cluster/329232/1 "2023-04-03T16:05:43Z")
we are getting GC and during that time heap usage is reducing and even sometimes the node reconnects from the cluster below are the params we are using and the GC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly [2023-03-28T20:08:48,861][WARN][o.e.m.j.JvmGcMonitorService] [node#] [gc][353382] overhead, spent [582ms] collecting in the last [1s] when the GC collected more that 4-5 sec the node went unresponsive ES config 7.3.2 Java 8 CMS GC ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [April 4, 2023, 1:33am UTC](https://discuss.elastic.co/t/elasticsearch-getting-gc-and-the-node-reconnect-from-the-cluster/329232/2 "2023-04-04T01:33:37Z")
What is the output from the [`_cluster/stats?pretty&human` API](https://www.elastic.co/guide/en/elasticsearch/reference/8.4/cluster-stats.html)? > [@navaneethan](#): > > 7.3.2 Please note that version is [EOL](https://www.elastic.co/support/eol) and no longer supported, you should be looking to upgrade as a matter of urgency. ---
**Author:** ![navaneethan](https://avatars.discourse-cdn.com/v4/letter/n/f17d59/32.png) [@navaneethan](https://discuss.elastic.co/u/navaneethan)\ **Post date:** [April 4, 2023, 2:04pm UTC](https://discuss.elastic.co/t/elasticsearch-getting-gc-and-the-node-reconnect-from-the-cluster/329232/3 "2023-04-04T14:04:11Z")
{ "\_nodes": { "total": 8, "successful": 8, "failed": 0 }, "cluster\_name": "####", "cluster\_uuid": "####", "timestamp": 1680616087075, "status": "green", "indices": { "count": 465, "shards": { "total": 4626, "primaries": 2313, "replication": 1.0, "index": { "shards": { "min": 2, "max": 10, "avg": 9.948387096774194 }, "primaries": { "min": 1, "max": 5, "avg": 4.974193548387097 }, "replication": { "min": 1.0, "max": 1.0, "avg": 1.0 } } }, "docs": { "count": 375345756, "deleted": 24576257 }, "store": { "size": "834.5gb", "size\_in\_bytes": 896067035648 }, "fielddata": { "memory\_size": "115.5kb", "memory\_size\_in\_bytes": 118312, "evictions": 0 }, "query\_cache": { "memory\_size": "201.7mb", "memory\_size\_in\_bytes": 211509652, "total\_count": 77104706, "hit\_count": 19919292, "miss\_count": 57185414, "cache\_size": 1850, "cache\_count": 2508790, "evictions": 2506940 }, "completion": { "size": "0b", "size\_in\_bytes": 0 }, "segments": { "count": 12168, "memory": "449.2mb", "memory\_in\_bytes": 471078152, "terms\_memory": "181.7mb", "terms\_memory\_in\_bytes": 190594436, "stored\_fields\_memory": "239.8mb", "stored\_fields\_memory\_in\_bytes": 251509664, "term\_vectors\_memory": "0b", "term\_vectors\_memory\_in\_bytes": 0, "norms\_memory": "1.9mb", "norms\_memory\_in\_bytes": 2046080, "points\_memory": "14.6mb", "points\_memory\_in\_bytes": 15402506, "doc\_values\_memory": "10.9mb", "doc\_values\_memory\_in\_bytes": 11525466, "index\_writer\_memory": "0b", "index\_writer\_memory\_in\_bytes": 0, "version\_map\_memory": "0b", "version\_map\_memory\_in\_bytes": 0, "fixed\_bit\_set": "76.3mb", "fixed\_bit\_set\_memory\_in\_bytes": 80035008, "max\_unsafe\_auto\_id\_timestamp": 1680528380254, "file\_sizes": { ``` } } ``` }, "nodes": { "count": { "total": 8, "coordinating\_only": 0, "data": 5, "ingest": 0, "master": 3, "voting\_only": 0 }, "versions": [ "7.3.2" ], "os": { "available\_processors": 108, "allocated\_processors": 108, "names": [ { "name": "Linux", "count": 8 } ], "pretty\_names": [ { "pretty\_name": "Ubuntu 18.04.6 LTS", "count": 8 } ], "mem": { "total": "848.9gb", "total\_in\_bytes": 911572004864, "free": "95.1gb", "free\_in\_bytes": 102122815488, "used": "753.8gb", "used\_in\_bytes": 809449189376, "free\_percent": 11, "used\_percent": 89 } }, "process": { "cpu": { "percent": 19 }, "open\_file\_descriptors": { "min": 561, "max": 47730, "avg": 26621 } }, "jvm": { "max\_uptime": "361.2d", "max\_uptime\_in\_millis": 31208114474, "versions": [ { "version": "1.8.0\_131", "vm\_name": "Java HotSpot(TM) 64-Bit Server VM", "vm\_version": "25.131-b11", "vm\_vendor": "Oracle Corporation", "bundled\_jdk": true, "using\_bundled\_jdk": false, "count": 8 } ], "mem": { "heap\_used": "34.8gb", "heap\_used\_in\_bytes": 37396632600, "heap\_max": "80.4gb", "heap\_max\_in\_bytes": 86433071104 }, "threads": 1193 }, "fs": { "total": "2.9tb", "total\_in\_bytes": 3219611107328, "free": "891gb", "free\_in\_bytes": 956724506624, "available": "890.9gb", "available\_in\_bytes": 956623843328 }, "plugins": [ { "name": "repository-gcs", "version": "7.3.2", "elasticsearch\_version": "7.3.2", "java\_version": "1.8", "description": "The GCS repository plugin adds Google Cloud Storage support for repositories.", "classname": "org.elasticsearch.repositories.gcs.GoogleCloudStoragePlugin", "extended\_plugins": [ ``` ], "has_native_controller": false } ], "network_types": { "transport_types": { "security4": 8 }, "http_types": { "security4": 8 } }, "discovery_types": { "zen": 8 }, "packaging_types": [ { "flavor": "default", "type": "tar", "count": 8 } ] ``` } } ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 2, 2023, 2:04pm UTC](https://discuss.elastic.co/t/elasticsearch-getting-gc-and-the-node-reconnect-from-the-cluster/329232/4 "2023-05-02T14:04:26Z")
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