Andrzej Bialecki  created SOLR-12815:
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             Summary: Implement maxOps limit for IndexSizeTrigger
                 Key: SOLR-12815
                 URL: https://issues.apache.org/jira/browse/SOLR-12815
             Project: Solr
          Issue Type: Sub-task
      Security Level: Public (Default Security Level. Issues are Public)
          Components: AutoScaling
            Reporter: Andrzej Bialecki 
            Assignee: Andrzej Bialecki 


{{IndexSizeTrigger}} can currently generate unlimited number of requested 
operations (such as split shard). Combined with the avalanche effect in 
SOLR-12730 this may cause a massive spike in the cluster load, and some of 
these operations may fail.

It's probably better to put an arbitrary limit on the maximum number of 
generated ops requested in one trigger event. This will delay some of the 
needed changes (thus leading to thresholds being exceeded to a larger degree) 
but it will increase the likelihood that all operations succeed.

A similar limit already exists in {{SearchRateTrigger}}.



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