Umeshkumar9414 opened a new pull request, #8345:
URL: https://github.com/apache/hbase/pull/8345

   After [HBASE-16089](https://issues.apache.org/jira/browse/HBASE-16089) codel 
target delay was changed to 100, that is not standard for CoDel 
([patch](https://issues.apache.org/jira/secure/attachment/12813161/HBASE-16089.v3.patch)).
 I have changed it back.
   To visualize why we should have 5 target delay with 100 interval, I used the 
[model](https://github.com/Umeshkumar9414/hbase/blob/0056886fb540ca1cfd9035aec489a3106c47bc09/hbase-server/src/main/resources/hbase-webapps/queue-simulator/adaptive-lifo-codel-simulator.html),
 With target delay 100 and interval 100 we are more prone the queue being full, 
although CoDel will be still helpful in LIFO mode but a full queue is problem 
as it can cause OOM.


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