potiuk commented on issue #14924:
URL: https://github.com/apache/airflow/issues/14924#issuecomment-914143098


   So I guess the quest continues. Hmm. Interesting one that it wen't down 
indeed after some time. If that's the cache then this would be strange to have 
`container_memory_working_set_bytes`  (I presume the graph above is this?). 
   
   I have another hypothesis. Linux Kernel also has "dentries" and "inode" 
caches - it keeps in memory the used/opened directory structure and file node 
information. And I believe those caches would also be cleared whenever the log 
files are deleted.
   
   If this is a cache, you can very easily check it - you can force cleaning 
the cache and see the results:
   
   Cleaning just PageCache:
   ```
   sync; echo 1 > /proc/sys/vm/drop_caches
   ```
   Cleaning dentries and indoes:
   ```
   sync; echo 2 > /proc/sys/vm/drop_caches
   ```
   
   Can you make such experiment please?


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