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https://issues.apache.org/jira/browse/SOLR-7191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832668#comment-15832668
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Shawn Heisey edited comment on SOLR-7191 at 1/21/17 12:32 AM:
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With hard nproc at 61440, soft nproc at 40960, and maxThreads for each jetty at
20000, I am still not able to create enough threads to start both Solr
instances with just under 1900 collections in the cloud. The user in question
is running a few other things on the system, but the number of threads involved
there is less than 300. This is definitely not an improvement over 5.x.
was (Author: elyograg):
With hard nproc at 61440, soft nproc at 40960, and maxThreads for each jetty at
20000, I am still not able to create enough threads to start both Solr
instances with just under 1900 collections in the cloud. The user in question
is running a few other things on the system, but the number of threads involved
there is less than 300.
> 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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