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https://issues.apache.org/jira/browse/SOLR-5267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776183#comment-13776183
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Jan Høydahl commented on SOLR-5267:
-----------------------------------
Note that this is already solved in 4.4 by using a completely different way of
discovering cores, without modifying solr.xml. See
https://cwiki.apache.org/confluence/display/solr/Solr+Cores+and+solr.xml for
more info.
> Solr.xml (persistent=true) - slows down when core increases beyond 3 - 5K
> -------------------------------------------------------------------------
>
> Key: SOLR-5267
> URL: https://issues.apache.org/jira/browse/SOLR-5267
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.3.1
> Reporter: Prasad
>
> The response time of deploying new core increases to 40+ seconds, when
> persistent=true is enabled in solr.xml.
> The issue seem to be due to iterations over the loop to add all existing
> cores and then generated solr.xml
> org.apache.solr.core.CoreContainer.addPersistOneCore - calls to this function
> need to be optimized.
> *Ideas*
> * Having only entries for loadOnStartup cores in solr.xml should be
> sufficient.
> * Each core directory can have its properties.
> * Transient core lookup can be performed through this file.
> * There need a better way to track the all registered core (than XML).
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