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https://issues.apache.org/jira/browse/SOLR-14275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17044634#comment-17044634
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Noble Paul commented on SOLR-14275:
-----------------------------------

This should not be the default behavior. We should use it as a flag

> Policy calculations are very slow for large clusters and large operations
> -------------------------------------------------------------------------
>
>                 Key: SOLR-14275
>                 URL: https://issues.apache.org/jira/browse/SOLR-14275
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: AutoScaling
>    Affects Versions: 7.7.2, 8.4.1
>            Reporter: Andrzej Bialecki
>            Assignee: Andrzej Bialecki
>            Priority: Major
>         Attachments: SOLR-14275.patch, scenario.txt
>
>
> Replica placement calculations performed during collection creation take 
> extremely long time (several minutes) when using a large cluster and creating 
> a large collection (eg. 1000 nodes, 500 shards, 4 replicas).
> Profiling shows that most of the time is spent in 
> {{Row.computeCacheIfAbsent}}, which probably doesn't reuse this cache as much 
> as it should.



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