Hello @AzfarB
Thanks for using Cloudera Community. Based on the Post, Your Team observed Solr-Infra JVM reporting WARNING for Swap Space more than 200MB being utilised. Restarting the Solr-Infra JVM ensured the WARNING went away.
Note that Swapping isn't Bad in general & the same has been discussed in detail by Community in [1] & [2]. Plus, Deleting RangerAudits Documents won't affect the same as Solr uses JVM as documented [3]. Indexed Documents aren't persisted in Memory unless Cached, thereby ensuring Deletion won't fix the Swapping guaranteed.
As your Screenshot shows, the Host itself is running short on Memory (~99% Utilised) & Overall Swap is ~80% at ~47GB, out of which Solr-Infra is contributing <1GB. As documented in the below Links, Your Team can focus on the Host Level Usage & Considering Increasing the Swap Threshold from 200MB to at least 10% of the Heap i.e. 2GB for a Warning.
01 additional point can be made as to why Solr-Infra Restart helped resolved the WARNING. This needs to be looked at from the Host perspective as to the amount of Memory freed & Whether the Overall Swap Usage reduced at Host Level after Solr-Infra Restart as opposed to Solr-Infra WARNING being suppressed only.
Regards, Smarak
[1] https://unix.stackexchange.com/questions/2658/why-use-swap-when-there-is-more-than-enough-free-space-in-ram
[2] https://chrisdown.name/2018/01/02/in-defence-of-swap.html
[3] https://blog.cloudera.com/apache-solr-memory-tuning-for-production/
