# Long gc pause happened on es1.7.0 plus jdk8u40 **URL:** \ **Category:** Elasticsearch\ **Created:** [October 10, 2015, 8:42am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949 "2015-10-10T08:42:02Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 10, 2015, 8:42am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/1 "2015-10-10T08:42:02Z")
22042 2015-10-10T10:36:44.751+0800: 1954567.631: [GC (Allocation Failure) 1954567.631: [ParNew: 1606667K-\>41270K(1763584 K), 1221.6222148 secs] 5895406K-\>4332232K(16581312K), 1221.6230128 secs] [Times: user=11780.20 sys=0.00, real=1221 .44 secs] is it a jdk bug or how to avoid it? ---
**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:** [October 11, 2015, 2:10am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/2 "2015-10-11T02:10:02Z")
How much data in your cluster, how much heap? ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 2:27am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/3 "2015-10-12T02:27:54Z")
doc count: 4,695,567 index siez:4.7GB(primary shard + replicas) index setting: "number\_of\_shards": "10" "number\_of\_replicas": "1" node count: 4 heap commited: 30GB ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 2:28am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/4 "2015-10-12T02:28:50Z")
please help to give suggestions ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 7:08am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/5 "2015-10-12T07:08:59Z")
can anyone give any insight about this? I really bothers us a lot ---
**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:** [October 12, 2015, 7:21am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/6 "2015-10-12T07:21:59Z")
A bit more information around the issue would be useful: - Did the long GC affect one or all nodes? - What does the workload look like? - What type of hardware are the nodes deployed on? - Is there anything else running on the host(s)? - Has swap been disabled? ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 7:53am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/7 "2015-10-12T07:53:04Z")
Which version of Elasticsearch and Java are you using? [answer]as mentioned in the title: es1.7.0 and jdk8u40 Did the long GC affect one or all nodes? [answer]only one node What does the workload look like? [answer]write with 500tps and search with 300tps What type of hardware are the nodes deployed on? [answer]256GB ram, 32 core Xeon 2.6GHZ, 1TB spin disk Is there anything else running on the host(s)? [answer]Yes, there is another ES instance with same memory config running on that machine Has swap been disabled? [answer]yes. ---
**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:** [October 12, 2015, 8:18am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/8 "2015-10-12T08:18:03Z")
Are you using parent/child at all? ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 8:43am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/9 "2015-10-12T08:43:07Z")
no, not at all ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 12, 2015, 9:08am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/10 "2015-10-12T09:08:36Z")
no, not at all ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 13, 2015, 1:05am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/11 "2015-10-13T01:05:21Z")
can anyone give any insight about this? ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 14, 2015, 3:57am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/12 "2015-10-14T03:57:07Z")
can you give any insights about this issue? I know it is tough issue, but u guys are exports ---
**Author:** ![tinle](https://avatars.discourse-cdn.com/v4/letter/t/c77e96/32.png) [@tinle](https://discuss.elastic.co/u/tinle)\ **Post date:** [October 14, 2015, 4:22am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/13 "2015-10-14T04:22:50Z")
How many shards total for your cluster (primary and replica)? Tin ---
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [October 14, 2015, 9:41am UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/14 "2015-10-14T09:41:41Z")
26 primary and 26 replica. total 52 shards. ---
**Author:** ![tinle](https://avatars.discourse-cdn.com/v4/letter/t/c77e96/32.png) [@tinle](https://discuss.elastic.co/u/tinle)\ **Post date:** [October 14, 2015, 6:10pm UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/15 "2015-10-14T18:10:40Z")
You mentioned 300tps for search. What does your fielddata metrics look like? You can get that from curl -s localhost:9200/\_cluster/stats Could be your queries are using up the heap. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:44pm UTC](https://discuss.elastic.co/t/long-gc-pause-happened-on-es1-7-0-plus-jdk8u40/31949/16 "2017-07-05T23:44:50Z")