zuston commented on issue #503:
URL: 
https://github.com/apache/incubator-uniffle/issues/503#issuecomment-1413055534

   > The size of RPC queue is unlimited, is it possible relate to this?
   
   Maybe. But from the metric dashboard, the GC is always along with the huge 
partition appearance. I will share some metrics of one shuffle-server.
   
   __CMS single GC cost 20s__
   
![image](https://user-images.githubusercontent.com/8609142/216214614-7080b6ea-3c81-438f-8924-ce3959d5728b.png)
   
   
![image](https://user-images.githubusercontent.com/8609142/216214694-77cba0df-aebf-4bcb-b868-0d6680e27dcf.png)
   
![image](https://user-images.githubusercontent.com/8609142/216214700-4aeb9c7b-6a5d-4d99-96ec-dc56684b5fe8.png)
   
![image](https://user-images.githubusercontent.com/8609142/216214707-038bfd6e-b808-4dcf-a30a-09fe29fc2c75.png)
   
   
   From this metric, I think the single buffer flush may solve this problem.


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