# Error In Opening Dashboard .\[\[gc\] overhead\] **URL:** \ **Category:** Kibana\ **Created:** [July 16, 2019, 6:43am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655 "2019-07-16T06:43:09Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 16, 2019, 6:43am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/1 "2019-07-16T06:43:10Z")
hi every one , there is a problem in my cluster after the data getting bigger and bigger the problem occur more , the issue is my dashboard didn't load when the data increased from 800GB to 1.5 TB my cluster is ok for every transaction but for opening this dashboard i have a error that raised in elasticsearch log like something like this :: > ``` > > [2019-07-16T11:04:10,765][INFO][o.e.m.j.JvmGcMonitorService] [DataNode-02] [gc][72362] overhead, spent [362ms] collecting in the last [1.1s] > > [2019-07-16T11:04:36,068][INFO][o.e.m.j.JvmGcMonitorService] [DataNode-02] [gc][72387] overhead, spent [283ms] collecting in the last [1.1s] > > [2019-07-16T11:04:47,070][INFO][o.e.m.j.JvmGcMonitorService] [DataNode-02] [gc][72398] overhead, spent [353ms] collecting in the last [1s] > > [2019-07-16T11:04:50,071][INFO][o.e.m.j.JvmGcMonitorService] [DataNode-02] [gc][72401] overhead, spent [332ms] collecting in the last [1s] > > ``` how can i solve this problem ? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 16, 2019, 7:01am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/2 "2019-07-16T07:01:43Z")
What is the specification of your cluster in terms of version, node count, hardware and heap sizes? How many indices and shards do you have in the cluster? ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 16, 2019, 7:12am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/3 "2019-07-16T07:12:17Z")
Elasticsearch : Version 6.5.4 Node Count : 6 Indices : 122 Shards : 854 hardware : storage : 3 TB Memory : 306 GB Heap Size : 165 GB Cpu Cores : 36 Core ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 16, 2019, 2:19pm UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/4 "2019-07-16T14:19:17Z")
anyone know the problem ???? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 16, 2019, 2:53pm UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/5 "2019-07-16T14:53:29Z")
What does that dashboard like like? ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 16, 2019, 2:55pm UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/6 "2019-07-16T14:55:32Z")
we have about 20 visualization in a dashboard on about 1.3 TB stored data ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 16, 2019, 3:12pm UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/7 "2019-07-16T15:12:25Z")
What does disk I/O, iowait and CPU usage look like when you load this dashboard? ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 17, 2019, 5:57am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/8 "2019-07-17T05:57:55Z")
about 97% in 3 servers and other as usual , **another question that i want to ask , is my heap size ok ? the server has 64 GB Ram and i set the heap size just 32 GB , Can i set more Heap size in this server ?** ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 17, 2019, 6:03am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/9 "2019-07-17T06:03:36Z")
Heap should usually not be larger than 30GB. Is that 97% disk utilisation? ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 17, 2019, 6:07am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/10 "2019-07-17T06:07:15Z")
no 97% of CPU Usage , three server going up to 95% 97% and kibana didnt respond for 4 or 5 minute ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 17, 2019, 6:14am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/11 "2019-07-17T06:14:17Z")
![image](https://us1.discourse-cdn.com/elastic/original/3X/9/6/96ab612b90908a35b1cebd4806ceb0a5acec50c2.png) when i click the dashboard my node result is like this : ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 17, 2019, 6:34am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/12 "2019-07-17T06:34:08Z")
Can you check I/O statistics using ‘iostat’ when you are loading the dashboard? What kind of storage do you have? SSDs? ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 17, 2019, 7:23am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/13 "2019-07-17T07:23:23Z")
**this is the result what you want ::** no there is no SSD Hard Drive , All Hard Disks are HDD. thank you. ![iostat1](https://us1.discourse-cdn.com/elastic/original/3X/6/4/640be1d1bc1df218c2eb237536736485715c707e.png) ![iostat2](https://us1.discourse-cdn.com/elastic/original/3X/c/4/c4f969cf6433db7798a1ab6407adb043a2e4ef4a.png) ---
**Author:** ![yaser](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaser/32/109240_2.png) [@yaser](https://discuss.elastic.co/u/yaser)\ **Post date:** [July 22, 2019, 4:57am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/14 "2019-07-22T04:57:12Z")
Any Idea? ? ? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 19, 2019, 4:57am UTC](https://discuss.elastic.co/t/error-in-opening-dashboard-gc-overhead/190655/15 "2019-08-19T04:57:17Z")
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