imay commented on issue #3285: Replica usage should be limited in database 
level to reduce the fe memory pressure and the amount of tablet in be   
URL: 
https://github.com/apache/incubator-doris/issues/3285#issuecomment-611363759
 
 
   @caiconghui 
   
   This is a good feature. I have some question about it.
   
   1. ReplicaSize -> Number of Replica
   2. How will this statistics be collected, and when the limit will be 
checked? You can explain it more carefully. 
   3. If number of replica reach the limit, is there any method leave for user 
to handle this situation? Besides giving them more replica limit, Doris should 
give them more options to handle this situation. For example, merge multiple 
partition to one partition, merge multiple tablet in one partition etc. And 
this can be following issues for this issue

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