[GitHub] [flink-docker] Myasuka opened a new pull request #43: [FLINK-19125] Adopt Jemalloc as default memory allocator to avoid memory leak

[GitBox]

Myasuka opened a new pull request #43:
URL: https://github.com/apache/flink-docker/pull/43


   This PR install `libjemalloc-dev` within docker image and offer option 
`disablejemalloc` to start daemon. 
   By default, Flink image will adopt jemalloc as default memory allocator and 
will disable it if option `disablejemalloc` is given.
   
   With the default args to launch taskmanager pod, we can see the 
`libjemalloc` binary so is loaded in the memory process of task manager:
   <img width="695" alt="image" 
src="https://user-images.githubusercontent.com/1709104/98807549-c623ff00-2455-11eb-84a8-afc66e5290e1.png";>
   
   When we add `disablejemalloc` in the launch args , we can see the 
`libjemalloc` binary so is not loaded in the memory process of task manager:
   <img width="752" alt="image" 
src="https://user-images.githubusercontent.com/1709104/98807691-fec3d880-2455-11eb-8d79-0b3e69d52b1f.png";>
   
   BTW, to use `pmap` command in the pod to show whether `jemalloc` is enabled, 
I installed the `procps` in the docker image which is not added in current PR.


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