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https://issues.apache.org/jira/browse/SOLR-14394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17078080#comment-17078080
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Noble Paul commented on SOLR-14394:
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I wonder if it's worth it to make them lazily register. They are extremely low
cost request handlers and I don't see the value in doing so
However, {{startup=lazy}} should work properly
> Many request handlers should be startup=lazy
> --------------------------------------------
>
> Key: SOLR-14394
> URL: https://issues.apache.org/jira/browse/SOLR-14394
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: David Smiley
> Priority: Minor
>
> Solr cores track a lot of granular metric information per request handler.
> This is noise for a request handler that we aren't even using! The vast
> majority of request handlers are not used in a typical app. That doesn't
> mean they shouldn't be available for use, I'm only saying that they aren't
> until perhaps for diagnostic purposes or something. *I think it would be
> better to not track metrics on something until we actually use it.* For a
> request handler, this is done by setting startup=lazy. Most implicitly
> registered plugins should have this set in ImplicitPlugins.json.
> CC [~ab] [~noble.paul]
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