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https://issues.apache.org/jira/browse/SOLR-7191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832908#comment-15832908
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Yago Riveiro commented on SOLR-7191:
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Restarting a node in 6.3 now takes forever ... I bumped coreLoadThreads from 4
to 512 and restarting a node with 1500 collections takes 20 - 25 minutes. If I
bump coreLoadThreads to 1024 or 2048 is faster, but some times replicas stay in
a wrong state and never go up.
Other thing that I see happen now is collections created without replicas.
Shawn where can I raise maxThreads of jetty?
> Improve stability and startup performance of SolrCloud with thousands of
> collections
> ------------------------------------------------------------------------------------
>
> Key: SOLR-7191
> URL: https://issues.apache.org/jira/browse/SOLR-7191
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 5.0
> Reporter: Shawn Heisey
> Assignee: Noble Paul
> Labels: performance, scalability
> Fix For: 6.3
>
> Attachments: lots-of-zkstatereader-updates-branch_5x.log,
> SOLR-7191.patch, SOLR-7191.patch, SOLR-7191.patch, SOLR-7191.patch,
> SOLR-7191.patch, SOLR-7191.patch, SOLR-7191.patch
>
>
> A user on the mailing list with thousands of collections (5000 on 4.10.3,
> 4000 on 5.0) is having severe problems with getting Solr to restart.
> I tried as hard as I could to duplicate the user setup, but I ran into many
> problems myself even before I was able to get 4000 collections created on a
> 5.0 example cloud setup. Restarting Solr takes a very long time, and it is
> not very stable once it's up and running.
> This kind of setup is very much pushing the envelope on SolrCloud performance
> and scalability. It doesn't help that I'm running both Solr nodes on one
> machine (I started with 'bin/solr -e cloud') and that ZK is embedded.
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