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Full GC

Created: Apr 23, 2020 08:01:25Latest reply: Mar 1, 2022 05:45:36 717 10 1 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hello all,

What is Full GC? How to prevent it? Thanks.


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Unicef
MVE Created Apr 23, 2020 08:21:22

The system checks the number of Full garbage collection (GC) times of the JobHistory2x process every 60 seconds. This alarm is generated when the detected Full GC number exceeds the threshold (exceeds 12 for three consecutive checks.) You can change the threshold by choosing O&M > Threshold Configuration > Service> Spark > GC number > Full GC Number of JobHistory2x. This alarm is cleared when the Full GC number of the JobHistory2x process is less than or equal to the threshold.
Possible Causes: The heap memory usage of the JobHistory2x process is excessively large, or the heap memory is inappropriately allocated. As a result, Full GC occurs frequently.

https://support.huawei.com/iknow/?source=searchSys&question=JobHistory2x Full GC Number Exceeds the Threshold.

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user_4400653
user_4400653 Created Nov 11, 2021 01:49:09 (0) (0)
 
Saqibaz
Saqibaz Created Mar 1, 2022 05:45:31 (0) (0)
 
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Axe_Z
Axe_Z Created Apr 23, 2020 08:02:22

Full GC-3283174-1
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Unicef
Unicef MVE Created Apr 23, 2020 08:21:22

The system checks the number of Full garbage collection (GC) times of the JobHistory2x process every 60 seconds. This alarm is generated when the detected Full GC number exceeds the threshold (exceeds 12 for three consecutive checks.) You can change the threshold by choosing O&M > Threshold Configuration > Service> Spark > GC number > Full GC Number of JobHistory2x. This alarm is cleared when the Full GC number of the JobHistory2x process is less than or equal to the threshold.
Possible Causes: The heap memory usage of the JobHistory2x process is excessively large, or the heap memory is inappropriately allocated. As a result, Full GC occurs frequently.

https://support.huawei.com/iknow/?source=searchSys&question=JobHistory2x Full GC Number Exceeds the Threshold.

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user_4400653
user_4400653 Created Nov 11, 2021 01:49:09 (0) (0)
 
Saqibaz
Saqibaz Created Mar 1, 2022 05:45:31 (0) (0)
 
wissal
wissal MVE Created Apr 23, 2020 08:44:26

Hello,

The Garbage Collection events cleaning out different parts inside heap memory are often called Minor, Major and Full GC events. 

What typically is relevant is whether the application meets its SLAs, and to see that you monitor your application for latency or throughput. And only then are GC events linked to the results. What is important about these events is whether they stopped the application and how long it took.

But as the terms Minor, Major and Full GC are widely used and without a proper definition


Full GC is cleaning the entire Heap – both Young and Old spaces.

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Axe_Z
Axe_Z Created Apr 23, 2020 09:17:46

Posted by Unicef at 2020-04-23 08:21 The system checks the number of Full garbage collection (GC) times of the JobHistory2x process every ...
Thank you
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user_4400653
user_4400653 Created Nov 11, 2021 01:49:29 (0) (0)
 
Axe_Z
Axe_Z Created Apr 23, 2020 09:18:03

Posted by wissal at 2020-04-23 08:44 Hello,The Garbage Collection events cleaning out different parts inside heap memory are often called ...
Thanks
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Anno7
Anno7 Author Created Sep 17, 2021 07:00:52

great
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Saqibaz
Saqibaz Created Mar 1, 2022 05:45:36

Thanks for sharing
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