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https://issues.apache.org/jira/browse/SOLR-14665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17165770#comment-17165770
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ASF subversion and git services commented on SOLR-14665:
--------------------------------------------------------
Commit 7c8427907300256e7b3bcf6835e43986a712ffac in lucene-solr's branch
refs/heads/branch_8_6 from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=7c84279 ]
Revert "SOLR-12845: Add a default autoscaling cluster policy."
To fix the regressions found in SOLR-14665.
This reverts commit 8e0eae260a0c38fa03e2eaf682d0db9d8b0b6374.
> Collection creation is progressively slower
> -------------------------------------------
>
> Key: SOLR-14665
> URL: https://issues.apache.org/jira/browse/SOLR-14665
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
> Priority: Blocker
> Fix For: 8.7
>
> Attachments: Screenshot from 2020-07-18 07-49-01.png
>
>
> Plain and simple collection creation (or even shard splits etc.) get
> progressively slower as more and more collections are in the system. The
> culprit is the autoscaling framework (possibly some unnecessary policy
> computation), even when *no autoscaling is being used whatsoever*.
>
> Here is how bad the situation is:
> https://issues.apache.org/jira/browse/SOLR-14656?focusedCommentId=17160311&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17160311
>
> !Screenshot from 2020-07-18 07-49-01.png!
>
> Btw, even when using createnodeset parameter, there is still a gradual
> slowdown (but less steep than the graph here).
>
> This is a matter of grave concern for anyone running a Solr cluster with more
> than a few hundred collections.
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